Malicious PDF — malware analysis report

Static analysis result for SHA-256 c009145b1f1fa0aa…

MALICIOUS

PDF

83.9 KB Created: 2021-06-30 03:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0bfcab24b48c7a8a25ff48835d6ab383 SHA-1: d3be02635504005b7c233d2a4010a4354f9e32d8 SHA-256: c009145b1f1fa0aaa181b4a63b779c416f73509b8cce001ab492cd332a0e0041
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or phishing pages. The presence of numerous unknown URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate effort to obscure the true destination and potentially distribute malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608193647818c---dufafetuvigenimudexig.pdf In PDF document text
    • http://amandatravel.com/userfiles/file/japaroratovapesoxep.pdfIn PDF document text
    • http://fvhs1970.com/clients/876770/File/31294212662.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/99879937025.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/newezipakazidulusox.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/8419072121.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/97165528613.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68cc298cf3---bejesabujomax.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a92d8fb9a88---29567016542.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9e2468a17819a285e023fd2264c73460/lunafarebekovakew.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/tujopiki.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/31c746d93b4893d63b3e9612e48917e3/17344805521.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/g5sbgt0540j9qtp06bbu4m3gjj/95087831743.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/30ab0e2b67c6d35604b394c126ba741a/nodutikoxom.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d979bad32fe---jinokepuberut.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/50943109692.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/zuxoketojesaminuxafetedu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/d0nod69m2a752ouu6t3ftthbj6/gojozukirowazejorobuli.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c6671fd4095---netazega.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c9c50355c---fawiwumugu.pdfIn PDF document text
    • http://iphysiology.ru/upload/41251863667.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///18860813840.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=filing+exempt+on+taxes+for+6+monthsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 11052 bytes
SHA-256: 1224eeaf0cdb2b3cd62d67db2d924008ee8cd1ddf980c16b1f0e125f2212cadf
font_02_sfnt_off000116e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 16648 bytes
SHA-256: 2390561a0c3ae953c40596c26f6c8e9b0ca60ee09b255a7fe3cf2832026db121

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