Malicious PDF — malware analysis report

Static analysis result for SHA-256 76045b532814e81f…

MALICIOUS

PDF

58.6 KB Created: 2021-05-15 13:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31b1f101b39a4863805f8e618f736d7c SHA-1: 457d8e1e004ffdead58559138d2cb35aca4193ca SHA-256: 76045b532814e81fda4a58f238c49d87d7a3ed85f867526390a2dbdff9bca860
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous embedded URLs that point to potentially compromised WordPress sites. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to external, untrusted resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9595

Heuristics 5

  • 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
  • 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://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/348f6aa9c90d76f5d8ecb5a7c70bb340/31497854299.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607f39a70146e---wumomilim.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/p5qcjdslctangakghnihig36j7/figijozam.pdf
    • https://stratasphere.online/userfiles/file/58345834259.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/24d97f6ae178ecbb12d672b7a7509b5d/nirimanisazuzafezex.pdf
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/f188f5421e2fce8c90da7ee6f334d8eb/wineruzuzobunuvekexale.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/9768f413b3cb155fd6c468ba3d192893/mefazog.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/4b1cd3938145b3002ad418740a199662/rudukafegile.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/0f19e82502b1e3483e4e6143940a9818/zijowuzikesivenejawufa.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/4f0644da9cc5832cf694f901c880766d/33497956285.pdf
    • http://sarljarry.fr/userfiles/file/susiroxavof.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/365ff852b42chhano55rtk0edo/podevuzimukixubasigi.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/cb7c623447ad780c0e8da27b5d2ca2c5/gogosukilojukaguvubo.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607217e7cf6ce---zolulavegox.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607698372ada3---sibexusewurukadud.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/147ddcb30ce796af69839ef5db78627f/maxakiwoworidijudidopiz.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ce1d9348---20727832271.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/bfe7297b8ad91cbedea94c53a836bd9f/luwavosakoxiratexete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=birthday+calendars+templates+free
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd03.bin
6948b2a684e9a1fb1c5c197d175c59b2cdb1a64a84ef2a70c9b50cff65c89da0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD03 5544 bytes

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