Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c43031acbfbdbc6…

MALICIOUS

PDF

76.1 KB Created: 2021-06-11 01:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ce452955311b93e21159f9a830aadff5 SHA-1: 2310dca4aa3a373e8d7064da7658eb8a56ab0282 SHA-256: 3c43031acbfbdbc6d0dcf5ccba9bfbed964cd86261f5d5ffaabc801c04e22792
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The presence of a 'pokemon omega ruby download' lure in the document body, combined with the link farm heuristic, indicates an attempt to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://huntic.ru/uplcv?utm_term=pokemon+omega+ruby+download+3ds+rom PDF link annotation
    • http://rymwid-training.com/userfiles/file/90673864490.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6d381b49a---32962403013.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/o38f0cj55j9pcqhcph007qpmfd/52371338584.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2806519eb4---43192977766.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/60860585351.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/sesapobipavexoxiwufedim.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/71721335094.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/kokutezewawoxawawuvu.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/i4iqngj99d57q93uu8q5d0b9e5/vavikusomedorofezax.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/16059a7a8878ea2c800a1537905212ba/7776336954.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/o8rfn0kk9kpb6083k2sh9toei0/10838051508.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/o6n8iv28bc8ud2j3pv1fds0igc/zaxokodigixuwov.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/12827d98e4e86599ca1fa9d07da6b73f/57909183975.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/38325479713.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/orbtttq5ih2p2dua5stdqnlvd1/9266377106.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca9e0d38c---83000768783.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/gadikerafe.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b304a6d877a---wotaletezagure.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096bced69a82---77132176132.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 5708 bytes
SHA-256: 875d57ff2c70ec3ba6c3b47b6138f1524d6502e93a9bc9249848dd06f3cbbd12
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 10940 bytes
SHA-256: d897c8b378a8a6ab1aa78367b8f5778a9d1f074a0bd00fdc37b5af976f54281f