Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2f0cf14b53b673…

MALICIOUS

PDF

72.7 KB Created: 2021-09-01 12:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 83d70f27e1f7f99c972964389ef90603 SHA-1: 54bb16862db7f3d02fe2d6e00e4d0dee50c815ab SHA-256: 0f2f0cf14b53b673426a011ecaf61f39a53d3fd22b9b1581610c3280056e1767
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://huntic.ru/uplcv?utm_term=i+hope+your+week+goes+well PDF link annotation
    • https://altbuket.ru/files/soxexapibidewa.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/ovhuibr23nogcgk3js5s9gdrcr/temikivexesedok.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d9f44b6e06d1d51c950c6ff04aa166b2/vivevinagonozaxuxim.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b504ebce17---piredovorasukukuvufi.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/safivaluwonirex.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/jupg1du1an8im6dbei5j7p2qg1/durot.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/rqdhnjqdcnk633sf7sa2vn78l6/kovenef.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/wivukavixuzaronosozatewud.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/41689539239.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/vaxumejelekajoziwe.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/87677746124.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/51644631755.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/60365246173.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/96f30f7bfca6f5160580b3250950bbf2/finepajosutonif.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f06f1fe18---22133573812.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/nebowif.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/20743c802172d0c22d603467af5ae45e/sakujefaroraxome.pdfIn PDF document text
    • https://people11people.com/uploads/File/lasakemomivini.pdfIn PDF document text
    • https://mmszke.hu/files/file/vixow.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/diximut.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/83707302010.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/wipefoda.pdfIn PDF document text
    • http://asvpp.fr/pdf/6006484837.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/32311388760.pdfIn PDF document text
    • 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_off0000bc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6D 16104 bytes
SHA-256: 252acecb490232bf9260ab7bd6959b7fb5e0d0b9f4999295d5992981bb5efd72
font_01_sfnt_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 10416 bytes
SHA-256: 8c04d21d7ad41c9f54a4f20e4eae2ad007154fefc6b146c2e6a38e4acebd7f85
font_02_sfnt_off0000fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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