Malicious PDF — malware analysis report

Static analysis result for SHA-256 3382e1c74450502c…

MALICIOUS

PDF

88.8 KB Created: 2021-08-12 23:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 7c87cbe7f8a834146b6003b789530083 SHA-1: ac7c075a6a660ea0b2ebc70c41dcea26f8c65022 SHA-256: 3382e1c74450502cd5598bd7abaf968ae60b07921cf6caf74e3236f7514b4f96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://philabc.ru/uplcv?utm_term=davis+drug+guide+pdf+magnesium+sulfate PDF link annotation
    • https://expobar.vn/app/webroot/files/images/pages/files/kekojetowadobuviru.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff18dcdf1f---58683875502.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a880d65e6c6---16828911958.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/gimogavalanemerizus.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/jewezuje.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d206a8b2c2---73913595327.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/93993283943.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/71521160929.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/a49a1hdp8e4c35f9jcd4qb9lvm/63545246810.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/wifojapabejiredumizo.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/waritisut.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/bagosawutoxaji.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/divobewefa.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/fubapimajaxutegapero.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/83816008608.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/50621008779.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16100313dc8703---tobovagetizufezub.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/3962fd030a3659d4b6ffda37dc11a0d8/gasuradapenir.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/27501532172.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/tosagusivomoleponimoli.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/2c0dc76d23d58926b9d512e6ff6d914b/furorasakafuxeb.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d3bbf1593391e82e86a2dde840ff9b9e/tovejimoxoruvodunobujak.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_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 19196 bytes
SHA-256: 1949f31bb18d6f9a2fec7f17ffcb419f360d74de93cc46d5127c9c8e06fa6ba4
font_02_sfnt_off00013bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBC 10888 bytes
SHA-256: 5e8d850d7385d268a0c13cf476d8b6f774cfbef4317d279934c108e2a9f8ae91

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