Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2c92e3663e4dd9…

MALICIOUS

PDF

70.8 KB Created: 2021-06-21 00:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d1d0018abe99977c1ef523f2aaf96e6 SHA-1: d77d35557ca1eacbe67e90865699774ced38a155 SHA-256: dd2c92e3663e4dd9ff16db438398a765777b2885c831a55a3e84a7d653027fd2
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which host PDF files within vulnerable WordPress plugin upload directories. The primary lure appears to be 'Maya 2018 crack xforce download', suggesting a phishing or malware distribution attempt. While no scripts were extracted, the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7573

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 https://medvor.ru/uplcv?utm_term=maya+2018+crack+xforce+download
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/onvoetkrm22u63m0f6kpdr3970/zuwuwupepifewagagasulime.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/54vuguhpbuk4ljo0u73r7l2f1g/91799466991.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/n425137daai2aehg34b03h4qar/puxaxitipizavulur.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/vq1u6t1tvg7nnujuqtscsiamt5/wifaviduzotekoxuwakeruga.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a435656281f---tejanogutunapuvakube.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/b41ec877dc54e43f88e01f3b1ce1e552/67902878032.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c28d06be6d8---nekunitijubibo.pdf
    • http://oilandgaswork.com/userfiles/file/7146026008.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160983227854a4---vetitezozireva.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d5086d22---mebepufusajakupukakobafi.pdf
    • https://nenanhduong.vn/Upload/files/kulerizerunikali.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16083e4134fe0d---xutomonilawuxodazifetu.pdf
    • http://boothbayharborshipyard.com/userfiles/file/49309220992.pdf
    • https://alternativecarrepair.com/userfiles/file/36745633258.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081032edd486---kudixovipebixamu.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a98d1070ee0---lipowebasivurumadarata.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1cc.bin
495dc75d95a6a6f45ac0640accda880cdd7226211fb355277ff836c691f61857		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CC 2960 bytes
font_01_sfnt_off0000dc3a.bin
d96d27e4cb40be567fc6b4f60707e82e06c4c631029b7ca85f16d3575b9584cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3A 5688 bytes
font_02_sfnt_off0000efde.bin
ebd580f58f05f11220830f3e3b2784d71615cf75ba0a5cca7a003d58a800d97e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 19292 bytes

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