Malicious PDF — malware analysis report

Static analysis result for SHA-256 c154c8f8470fd298…

MALICIOUS

PDF

85.7 KB Created: 2021-06-27 04:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b36a0ee01ad6b70fdb155f1b4aa9d509 SHA-1: 2d8043e89511610f8954ade9e6a3bad6aa1aaec9 SHA-256: c154c8f8470fd2989d1995332a15842090373df7e979f5245ce22b53c9d2537b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a link farm or redirection strategy to host malicious content. The presence of urgency lures further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094bdbd27ce7---forilorafanegi.pdf
    • https://jerseyshorepirates.com/userfiles/files/xuguvumamapotuxosu.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b791de5485---32210685948.pdf
    • http://minhanh.com/files/zoxamadasadu.pdf
    • http://skogsformedling.se/bilder_umeny/File/dovopezevolab.pdf
    • https://healthmatters.me/userfiles/file/48551331955.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/499b898e424ae059bb47cd1f28aa1994/kunubufovofugawukapipana.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//11431446644.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092744d87d13---49306616670.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085e5d4788a4---72911288811.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9a14d6cbc---felamajubaki.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608710ca0bb11---luwezodisedo.pdf
    • http://cnokorea.com/userfiles/file/51691616797.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tmdsh6u9msm93fgdhuf1qkhnav/53423121216.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/is1ikdqtuk9vqunv7djcbmia47/63990973696.pdf
    • http://ledins.lv/cms/file/wesewinuf.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160d3815906036---64297618061.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4fe747902---40521004506.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/926d5c2f343febf634017441a9409a48/31047924530.pdf
    • https://aradovan.com/userfiles/file/napinuzezapowuxof.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d63c5439e54---genudodilonurom.pdf
    • https://hirurgija.me//files/netulinasuxusi.pdf
    • https://airbays.com/userfiles/file/faxomufizojorudar.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ab+negative+blood+type+pregnancy+problems
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea46.bin
1d5b959a437cc1b47db66b444d2e7bf37ef3e6ec22e5cd2d061bcd32c8a0bbd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 16828 bytes
font_01_sfnt_off000115b3.bin
b15b8e7fda720731b6f517cd708a33ef529ce65c8851c38adc4b241dc40fdd09
pdf-font-stream PDF embedded font (sfnt) at offset 0x115B3 11160 bytes
font_02_sfnt_off00012f73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F73 16792 bytes