Malicious PDF — malware analysis report

Static analysis result for SHA-256 47571bc2d7fca9b2…

MALICIOUS

PDF

84.8 KB Created: 2021-09-05 22:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 33dd7329b7ea11bbe0b9a1ab6fca83d0 SHA-1: c92b047bb4e7715ee3f03a0be9efbf02dd16afba SHA-256: 47571bc2d7fca9b2f1a6d11a181163dde57e79a80c0997e9bab0435b99653070
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting it's used for phishing or malware distribution. The presence of external URIs and link farm characteristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://samavetpharm.com/userfiles/files/waxonazare.pdf In PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/7264cf5ffeb35ab35dc55fe930f05a84/4922815375.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e1f9635b7ffab4faf8a02bdc6036500f/48108745416.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/nevowojom.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/guhrvfku1c96k2dmst5ps48j7c/2038662305.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/xubiridox.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81cff01d86---wumenon.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/16057259142.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/jojoxir.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/zoweketi.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/6260646967.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16090379791898---bobegadig.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/tesosewaroromon.pdfIn PDF document text
    • https://people11people.gr/uploads/File/12386228995.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5ee9aef0b---sowokowaruzopejevipu.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/sigawidifopeg.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/98328526414.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/gd4d1lt7lmg19t0tj0ophn0lmu/vodinidu.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a776fdc4df9---28139121633.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4fad42fe25602b9b698d53a9e29f3d48/8707246875.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/69539877855.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/tiwilolototewe.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/falegiziludujimev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=escala+pentatonica+de+guitarra+pdfPDF 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_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 10880 bytes
SHA-256: fc46411dafa250252c64df5d026ec6754666e7c013cf941b4188a0b5bbbc7d80
font_01_sfnt_off0000fc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001141f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141F 19240 bytes
SHA-256: 0dc5b1bebd49a07341101f8659783ddb4a32e581bd559a68f9903886b56476c8

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