Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8087422345f1852…

MALICIOUS

PDF

105.3 KB Created: 2021-06-26 00:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: adc4d054e765a8520df39871067ec14e SHA-1: 6053c394f426eef474de715c5b08e03e62b772e0 SHA-256: e8087422345f1852a553dc9016be9ea3afa3110f5e35b1c40ebb1a6afab872b5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, hosting numerous URLs that point to compromised WordPress upload directories, likely serving as a distribution point for further malicious content. The presence of 'LOLBin token sequence' suggests an attempt to disguise or execute commands within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39d86a320---gorivejosupojibisegazel.pdf In PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a594f8edc5e---10568204256.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d51b42ae2da---98572804512.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/mcu57iv7u60ckl1ln6jj5tnag6/34503980173.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/l7ualmmrrklvmfhgdrvmg9210k/87192120058.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/78d05da034efaa7f6bcf2a3c7d095c13/faditowelatodidupel.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/f32a432ef635c0c7ab00ed4019d87cd2/90037249917.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/fv62avgfeh53cmd5ab5d4rrlcp/1429350181.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/18ojn9082r0sm6nmio3345j8bn/49767489166.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/10946803505.pdfIn macro / runtime command snippet
    • https://grancom.by/upload/docs/nuborogisuguvafaluris.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/fd8bf832e296f6d7493c51dad81cb10b/51083772333.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/95555078098.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/44388473220.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160836df274ab4---lunitavadewodesujupi.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/c31ba02d047e9q4q09pa0e49d7/kaxolewavopo.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/lesotidekorurofemog.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a63ae742bd85b8824f94f95b1a1e48cc/2009015951.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/63ae9a67fa92e0ab09b5bd831a3a5735/67705660424.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/u4avskbdreo1mv1n8n5ipglvc3/revuv.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/48367242801.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d285b8dbc7---93471864523.pdfIn PDF document text
    • https://tsegypt.com/file/genefolakiku.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c907eb60f---wutufixuxiwasilefisenos.pdfIn PDF document text
    • https://www.deuba.info/wp-contIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=a+list+of+similes+and+metaphorsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15215 17436 bytes
SHA-256: 7d85649ef9416563d0c8c21828eab97727c8d6aaeb17fcb0e886df76f69f37de
font_02_sfnt_off00017f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F9A 10744 bytes
SHA-256: 151afedaad38ab2b563bfc80214dd6b59b7f7a569f8559d7858330cecab4f0f1

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