Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad047600b2f51f8…

MALICIOUS

PDF

77.5 KB Created: 2021-07-04 04:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d7c126da10c07635c0d7f6ea807e7b52 SHA-1: 034e02b5dc06b7e4ac98687ac3c40b35c062455e SHA-256: bad047600b2f51f80dda9aef6f2d4d0373940d494b8b8c6bdef50679878ab474
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a ML classifier and ClamAV, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific intent beyond the link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e39f4d0a02---lulaninofixaxonize.pdf In PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a54fdd4ef7---90079121801.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/5d9471aabb6bc774d384952624cb9b32/bidugarekufarumegepovis.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/1llcf7qenm8l941hl6jjh45dn4/63257747264.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/13480455172.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/9325f37f50a5c49c10ddbaad442b7f1b/wasubudegirulodinubut.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/f5b3c87334a5d1bf18fca11cdd9bbd61/48486064489.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/tizawazifexufufepaxexo.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/xotukatumolawonutekuvug.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/v496ht8b0nt6k5doij4q4gr8k5/11057562145.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d09dcd50a9c---xesotelelivet.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/zudutimugenonix.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7be5d8ea04---1787946472.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078443ecec3e---minuxugizenusutitom.pdfIn PDF document text
    • http://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/70061491578.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9e1a70df8d662de94ea5f17bc9ab0beb/29652994161.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/11332391423.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/b091eb2f08b8bf3f50df366cf9803f0c/5197991106.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/262295ef235b8e42239ac9c5fd646a28/28763118459.pdfIn PDF document text
    • http://446888.top/userfiles/file/72003868278.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aac7b7f1dbb---favewulowibesajefopav.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mt5hug0rc7amlnctmr5ji3jvuc/29415862698.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/8gdcp52fcl9aebevofpldt40h3/melurewif.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/1943594550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=m+to+m+ferryPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 16600 bytes
SHA-256: ab513dc992dad22cf9e460d9dfa0117fba7bb733efdc7eae5344c9621d70a2db
font_02_sfnt_off00011323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11323 9912 bytes
SHA-256: e54fe43120f81cef1a4eabb176ef1ebce4a9db63a52a20a1169782c60abb01fb

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