Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c341c82c46280c3…

MALICIOUS

PDF

79.3 KB Created: 2021-06-13 05:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 33ec60682046f45a4b26de58ec5d4d94 SHA-1: 127f79ccca4a1a756b4db93e0078f7726a5401b2 SHA-256: 9c341c82c46280c3402c2fa67358deaf016ac6c583f0782ab211bf01e5095ffd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, with the primary suspicious URL being https://huntic.ru/pbw?utm_term=bombergrounds+mod+apk. The PDF structure suggests it's designed to act as a link farm, potentially for SEO manipulation or to distribute further malware. No scripts were extracted, but the presence of numerous external links indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://huntic.ru/pbw?utm_term=bombergrounds+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424029/normal_6008fa13422ac.pdfIn PDF document text
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/ccd8b141d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449405/normal_6051ec1b11d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479446/normal_600ef5cd7f552.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377125/normal_600513c66f58e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_6059267db5532.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5ffca84dcf523.pdfIn PDF document text
    • https://durunefa.weebly.com/uploads/1/3/4/7/134712847/8009335.pdfIn PDF document text
    • https://duvefotod.weebly.com/uploads/1/3/1/3/131380754/6ff6fc50f8af55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_605139ceb548a.pdfIn PDF document text
    • https://donaxitod.weebly.com/uploads/1/3/4/6/134688316/7518476.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/d3746372-93eb-44a6-ab2f-e5ee7f27676e/31514752206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655f1ce8-c749-4c7f-920b-888bfd46d460/68502294280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee0c88c-df2b-4c13-b3a1-0eb508242e51/faxibejuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e76d2e5-a2b1-4122-bf37-1da60cd68d5a/brother_tn_630_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0627be-ec8e-4af0-8abc-e9157cc1b072/35007969984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9d66b5-cfe4-4940-a94e-453223774435/how_to_buy_bitcoin_simple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2a48a2-ed08-4af4-9a79-72ff48629f73/asi_hablo_zaratustra_libro_original.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f75b13d-49dc-43a1-b017-fc4c886697cc/ergo_360_baby_carrier_omni_cool_air_mesh_oxford_blue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4441a1-6108-44b7-8025-6f17ee61f44f/astm_a240_316l_mechanical_properties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b563cdd3-5eac-4dc5-8cb4-d95df429424e/34558152881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cec9652-030a-49b9-aa37-17e472ea7ec5/sepes.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_off0000f8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 5500 bytes
SHA-256: cff897e2e00fe76750c20f90aef7ae18a839a13eb909742c26d3e35bf8fe49ea
font_01_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 10828 bytes
SHA-256: b9409363aa87c15b8f40962623df4c4f13fb8a1f51e509592c069074a0a81ac5

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