Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b429e9d19216bea…

MALICIOUS

PDF

93.1 KB Created: 2021-09-05 06:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fee0963292d9729d03691739a647052b SHA-1: 4a518bba2ea72cfc7e39de95d140521a4e0b19ee SHA-256: 7b429e9d19216bea83b43435dd6a4c79d2bb5c66db46285ee15c200172608cc0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and link farm behavior are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://archism.ru/uplcv?utm_term=glenohumeral+joint+anatomy+pdf PDF link annotation
    • http://musicpark-live.de/userfiles/file/dopovirogux.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c452c409eed---nopelutizumexuxupugofim.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/ce9270329f1d34145adebac9357159e2/59321600666.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/mavonakarowajezapefeso.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/86955402863.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/9000536700.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/kupoxunuzuwuwuvebawefirom.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/70312234581.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/ponuxonofalasuxagituded.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/25976382177.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/zarubogevedowewigizepa.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/mokoderamigako.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/xulixokeke.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbdd279f64---pixefizivokabenefonuket.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8185897d458c70ccc2882894ae04fd70/xasijigixumewovug.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4a73863e76d64fa1a141b4b427378d59/9710155842.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da4b0b083f5---69200271515.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/8a3cd5454b7762f04b692b5cdbe33481/1575532373.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eff31171b---gutibitatedozodukofol.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/71092137982.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_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 10976 bytes
SHA-256: fb57b0ff569c33f4e31a0dcc2553acdd479557ee726583d3f3ee5a6f58cffdf7
font_02_sfnt_off000137b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B8 18088 bytes
SHA-256: ac29a6b65cf71516ad0909c749b2fc883d92a60842c3dff7d783d54a3a95ddaf

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