Malicious PDF — malware analysis report

Static analysis result for SHA-256 2548ed5dd7d80c9e…

MALICIOUS

PDF

84.8 KB Created: 2021-07-05 17:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0a50602d788e903ffc1e9bf3f305674d SHA-1: 6f2bf60872b3677c8793b6fd8f07d71381802a90 SHA-256: 2548ed5dd7d80c9e72c47beb46ebfe9b8559646f8876ae42f9e893803149b9f6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware through these links. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the link farm itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://domusanna.it/userfiles/files/52968705656.pdf In PDF document text
    • https://cottonweb.net/userfiles/file/76264787601.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a29766c45c74cf51fc7fcecf065b22bf/xamoresowebedipipiritu.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/85985200459.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/f918eceffe3658003f5d2cc7ce0e3a9e/32825431594.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609831f163f1c---kavusuti.pdfIn PDF document text
    • https://technische-dokumentation-hoffmann.com/upload/files/dimijalewuxaregizetoto.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/fipamivabejekedaj.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106161213323569.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/72e88c5eb119c04b7fd9b1fdf0f48204/66066941022.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/hodkauvaqjcck8ehai76p77qnp/47152288555.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd426db1f3---19639319035.pdfIn PDF document text
    • http://turatabor.hu/media/9099806140.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/topakudev.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/19976e8f80d6940fd9d2ad9193cb00f0/sidolaxubafulalasezopox.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/12327655780.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/pamejutojawukubom.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e67b3167cd21fa859d0891f972dfc086/65600032882.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1e1711be9808c87a7e24cd41b6257ab1/laruvituvezuxojatiwulawo.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b071e0887---98148906528.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0609814ed---refuvodabesukoda.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/junovejasob.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/58812674860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=wagner+judaism+in+musicPDF 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_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 10672 bytes
SHA-256: e380d894573f6aaf7b64e9f240f3d0adb117ca701a02279e757cc9f8ababebff
font_01_sfnt_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 16680 bytes
SHA-256: b7b516e7339487c70711e227b2299a3818d2a61726481565b6e70236affd073a
font_02_sfnt_off00012e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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