Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a76d35e220b34c8…

MALICIOUS

PDF

72.6 KB Created: 2021-01-05 07:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 59995f611a711e92c1acf0413212878d SHA-1: ea3cb29f980ab060e8794968275c71704beb8132 SHA-256: 2a76d35e220b34c889f503a0847ac526168fbe9b555594f2828bd8d2ff4bd94d
344 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing and redirector lure. It contains a large number of links pointing to disposable domains and known malicious redirectors, designed to lead users to potentially harmful content. The document also exhibits characteristics of a password-protected archive lure and an MFA harvesting lure, suggesting an attempt to steal credentials or bypass security measures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/123?utm_term=progress+energy+center+box+office In PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/sevejamofoxun.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/bosarixoval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_5fbc8998f2b00.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/jefIms6/car_accident_townsville_today.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402267/normal_5fecc2ac4f0b1.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/hghhDhg/21473423364.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/an1hjUD/mabipafadil.pdfIn PDF document text
    • https://cdn.sqhk.co/puberufibo/gflge5O/super_slow_motion_camera_app_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fd3cc9baaaa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5fcdeca484b5e.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/jjThije/physics_class_9_icse_reduce_syllabus.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/05gfjve/online_business_ideas_in_pakistan_2020.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/3487431.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/fa6ce45e.pdfIn PDF document text
    • https://luweregovim.weebly.com/uploads/1/3/4/6/134661757/romugududexujagef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 5120 bytes
SHA-256: b2104f4fd727f28bee6140dd470d4afceaba010b2cf75655d9be7768dfba356f
font_01_sfnt_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 10836 bytes
SHA-256: eddb3957c775bf8fffb224fc1d630c65c3515888149dc0c988c0529acaf091fa