Malicious PDF — malware analysis report

Static analysis result for SHA-256 928e1e8b2d3851cb…

MALICIOUS

PDF

85.8 KB Created: 2021-07-15 21:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d664af7513933635d44efcd4d21b3ff2 SHA-1: 2e358dee0c89f21cc5412293ea3a7131331639de SHA-256: 928e1e8b2d3851cb0c5c43bcadce6ad1a6685a02e162c6a2e5446d6e177c877b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern. No scripts were extracted, but the document structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9daad586c---wovofapusap.pdf In PDF document text
    • https://scriptdd.com/_file/file/93565744768.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085747e6d208---budoxubuvasadelonafareni.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/xamerotexumi.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3c75e5f78---panafunef.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/59817650893.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/8cab2d962d0dd1590152810c6f33b250/83937209981.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/84946508894.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607419f86244a---93175300130.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083a3c77bfd4---58981090544.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/89612909862.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed7fe212a9---75595915048.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55c707f945---67991026486.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202166736349343.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/faxepesut.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/82970796625.pdfIn PDF document text
    • https://netpage.info/userfiles/file/64227771207.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/43951172354.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/17761362632.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/wokewigelibelumurenumaba.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/gorobir.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/38424625000.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/jumadezixivexu.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/s076rvudeqbhpbp6gj167qhsh1/jofasepibe.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/32409633499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=all+daedric+questsPDF 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_off0000ee05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001061c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061C 10368 bytes
SHA-256: 82ba6a35001ad680162a665f506bb1fd722f21c2e94c4ac5d56229f0ad1d45a7
font_02_sfnt_off00011d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6A 16632 bytes
SHA-256: 0b0ff29f99d18c54703bcdfa43dd3b96235af439b506ece511f9e833b611191f

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