Malicious PDF — malware analysis report

Static analysis result for SHA-256 242177365135fd04…

MALICIOUS

PDF

86.5 KB Created: 2021-07-14 02:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dce7eeeced5273bdce0a77a4153dccbc SHA-1: a9e63b7c18d5b11e7f2ec27c20c366debcccd346 SHA-256: 242177365135fd04b7319e42960e6febc71aedd761d8440e0264313dbc985b3f
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload directories. These links likely lead to phishing pages or further malware downloads, making the primary attack pattern the distribution of malicious content via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://crosswaysrecruitment.com/userfiles/file/51679872950.pdf In PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210703040307.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/e9461ff3a68c28443157d599ddc8cc57/lufizuvisapup.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f572d4e9d---92963993990.pdfIn PDF document text
    • http://bjjiffy.com/upload/leluzifenunedejuje.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f1fe68cdc3b87660decc19a6e70b5f13/24791074383.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac76714236c---rusolanemenogaxixexu.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/34578287792.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/7ec296d656c8a1013828064e18187434/56254081394.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/tajozepokur.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/89224191266.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/55998350466.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/zixafeguboxozujojexisurob.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/16576415813.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/9275775814.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/gadutogepudesofosukatu.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982143a07c5---22356939638.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a598b98be5---fugevowuvujafozugunimem.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609adea6ce07c---vuxarib.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/d420d5c3c95bdb582df3fea3caf10c55/32481797662.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/talexajoloji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=downloadming+a+to+z+movie+listPDF 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_off0000f143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF143 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001095a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095A 10704 bytes
SHA-256: a152bfd52c8d7f7fe516896857e4e03bdbf9928b66ea488b3a48d8eadec762d9
font_02_sfnt_off000121c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C0 17056 bytes
SHA-256: 9988bfdfa36da3dccbdad3bac3f25aac33961dc4665799ee1056f28221fa6993

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