Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e27f4ab70bd2a83…

MALICIOUS

PDF

85.8 KB Created: 2021-06-13 02:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: be5e9bdd5c9e1356ce7110d2f9d22f8a SHA-1: e2c0985879aeae74769052197924a12d60b00c24 SHA-256: 0e27f4ab70bd2a83d2d7e34e918cda1df06668281ccd931919dd31e1478587e1
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smidgel.ru/uplcv?utm_term=sai+ram+sai+shyam+full+song PDF link annotation
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ff9334d92---7489844202.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/7813808305.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/88023189851.pdfIn PDF document text
    • http://web68s.com/upload/files/55986981722.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/c477474f6437127331a7a5af7a82743a/65600915347.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/14a8c26d95e7d91d454deae8e9fc84a4/43061064186.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/surunonusulatigurojutug.pdfIn PDF document text
    • http://www.celso.org/download/zaxikuzalutiwobatubuv.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eec8869f0---40461709305.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/b88891b7ad724389119df233f0eae497/fexifaxopofunenamixe.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/2a8532f8c713a7b4bd7aa523f2dd9a36/1813240082.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/5tr561vfc323mekqt15vn35an7/41234003912.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908bb4bdfcd---2266401031.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 5384 bytes
SHA-256: 4dbf055b9970db6bd43367297c61c474c00f9b4624d3b3a554da35179cd81a29
font_01_sfnt_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 10336 bytes
SHA-256: a8473a31aec0402c33c65142d13a67c25afe06cba616cdd880ff72f14d75a738
font_02_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off0001314d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314D 7336 bytes
SHA-256: 5f5688dce15de321efeb3d6b15289d5f99ea1ac2b57cab99f3e40d2e1da7e73e