Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e02e3c9fe632a8b…

MALICIOUS

PDF

91.8 KB Created: 2021-05-30 01:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3484abe553cc89b98c2abefab0d17952 SHA-1: dcfba05cfcbfcf0426a9cde9f58ec1609a5b3f5c SHA-256: 9e02e3c9fe632a8be37645947d8adaac9783181b7d0fb5595d93d16c4491c20f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/strik?utm_term=angry+birds+star+wars+2+mod+apk+new+version PDF link annotation
    • https://wonuxomi.weebly.com/uploads/1/3/1/0/131070523/wiritobax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5fd80e5476fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_60394f2ba8c29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5feb773e8b4bf.pdfIn PDF document text
    • https://pelunukemuf.weebly.com/uploads/1/3/0/7/130776607/4541013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_601c6284b1ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_602807e2d5744.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407998/normal_600343834e68a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404313/normal_5ff05d5ac0044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_60131e1b109b9.pdfIn PDF document text
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/7508343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_60443c2211bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_606da7e21f27b.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/jeregowemov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369900/normal_5fc59b3d1894c.pdfIn PDF document text
    • https://kojezuduw.weebly.com/uploads/1/3/5/3/135326104/xaxojilelepevozuzek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c66accde-c125-4525-b623-65df93d44138/nutrition_care_process_and_terminology_a_practical_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09f70a7-6687-4060-ac1a-c67dc14fdacb/99614288477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a5fc1c-d4e7-4142-9db9-1722a178660a/lupaputevuperazoxiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738c76da-ac73-45b6-a451-97c6790c3394/2571424141.pdfIn 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_off00012225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12225 5824 bytes
SHA-256: b427d5d23174a213211235e86deda66a641055727701d62a87fa41ca7a83a0fa
font_01_sfnt_off00013605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13605 14540 bytes
SHA-256: e5c64760b60e8bf0c5e2704f7441a8105c675eaa24832ca31d314e6fec227116

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