Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5215124968f78b…

MALICIOUS

PDF

149.1 KB Created: 2021-07-08 11:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 187d9aef801f63a278bd78314e0fd4ea SHA-1: ca266a2882fc4e8b97b340e49477bc33e3d54866 SHA-256: 5d5215124968f78ba41a017ae527f8391348027427016a1993c3164475dde8dc
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS upload directories, suggesting a distribution mechanism for further malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to lure users to these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b42a0d7ca---xuxafajomategemu.pdf In PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/slsqkkm611tleb80n1ac7ul6i0/74418056792.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/tavorekusul.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/7f7859631aebd47547bb617e47113f4b/80122458573.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/31296411617.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/78jdfhfd632dqf35vrpdt86kf9/98662276669.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f18ec6ddd---13163549426.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/80125096244.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca1ca62bb9---61767769351.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/g8s8j6gikfg4l8uhvns77itd6t/67427323033.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a390c976972---vakopita.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/monomabadidoruduxojizibe.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/37428181764.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/92691784531.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210616224242_vv2grr.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724bbbb4c04---luvudiruzuvimetepuserag.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f5523487b---20173329629.pdfIn PDF document text
    • http://ruresept.ru/files/file/duxajuw.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/64031634157.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/20e70e500c06686293cee2f358ba643f/wakizebebo.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c8b352cd3708accdfd6412eda7cffe2d/21222576049.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/6dd13f9898409d64444d5f290caa5210/zuzami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=pushkin+i+loved+you+oncePDF 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_off0001dfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFEC 10480 bytes
SHA-256: 85ba2c4bc7588b248193573fa1284ec249f7a24d5a4685161ae0b2c93b353b58
font_01_sfnt_off0001f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00020fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FCA 21984 bytes
SHA-256: a2784f594c65b66591839d3184975459e6e44e4d4b0e9518929ad8fba28744b8

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