Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2fc8cc54a63835…

MALICIOUS

PDF

77.7 KB Created: 2021-05-24 14:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 449ad82ec8b06d180a84ed01c53579fa SHA-1: dc399df4eb392ad2046792a76cd7897ae468e57c SHA-256: 5e2fc8cc54a6383551b06de15d4047816700b9bdde4e949447fe477c6d45416d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating a PDF link farm. The embedded URL `https://mezovuvuw.ru/strik?utm_term=imam+ghazali+books+in+urdu+pdf` suggests a phishing or SEO-based lure. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=imam+ghazali+books+in+urdu+pdf
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fcc2d5b0667b.pdf
    • https://static.s123-cdn-static.com/uploads/4451039/normal_5fdfb57ca462d.pdf
    • https://cdn-cms.f-static.net/uploads/4393641/normal_60554dd59043d.pdf
    • https://puxikatekeji.weebly.com/uploads/1/3/2/6/132681322/zogebadanoriwipifebi.pdf
    • https://cdn-cms.f-static.net/uploads/4407994/normal_603ad69e8e971.pdf
    • https://cdn-cms.f-static.net/uploads/4374368/normal_6054847a78484.pdf
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5fdaedbf36453.pdf
    • https://cdn-cms.f-static.net/uploads/4393641/normal_601ac627539a4.pdf
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/4a6737530046b.pdf
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5fca6ceab32e1.pdf
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fe082d6858c6.pdf
    • https://cdn-cms.f-static.net/uploads/4392864/normal_602ac63eb6209.pdf
    • https://cdn-cms.f-static.net/uploads/4459621/normal_601ba805e78a8.pdf
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/tomogurirabup_liwitiwubibuxex_mitid_gesek.pdf
    • https://cdn-cms.f-static.net/uploads/4471488/normal_6016f44b60717.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/solonebosop/excellent_academic_performance_meaning.pdf
    • https://uploads.strikinglycdn.com/files/3227e6d5-a652-4f45-9a92-e5e45394e271/14863333925.pdf
    • https://s3.amazonaws.com/wovugi/ganagepo.pdf
    • https://uploads.strikinglycdn.com/files/ec5fddc9-7b88-402e-a0d0-eccbee0b3334/golds_gym_720_treadmill_amazon.pdf
    • https://uploads.strikinglycdn.com/files/da2922a8-8972-4085-ad9e-9c3267b9bc55/zevotenifikexakimejoki.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/xewofevikeserasipudajunux.pdf
    • https://s3.amazonaws.com/luramamelolem/16798045000.pdf
    • https://s3.amazonaws.com/dazemi/new_bhajan_song_audio.pdf
    • 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://scripts.sil.org/OFL
    • 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_off0000d740.bin
b64828652bed6d3f2ed632c596feae63f1ba9fec8ed1687975ae457291fcbacd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD740 5644 bytes
font_01_sfnt_off0000ea4a.bin
b0abc75fa4e214da75feec70f9654f923de812363feb4a9044a6b96d9cde1664		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 10220 bytes
font_02_sfnt_off00010d5b.bin
8a57a5e0f59079f502c375f58daac6c76bc793dfd443c7c49751e8cc5eaaf552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 17544 bytes

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