Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bf133a6f81b99a…

MALICIOUS

PDF

71.8 KB Created: 2020-11-25 01:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1c58322f1ed8049d636430c0aa4d281a SHA-1: b11a671cccdfa3f6866142041c380e686fdc818f SHA-256: 86bf133a6f81b99a7cb000a7938ab59fa265ea7e98adacdcea3b1c4e58d48582
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF sample was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a mass of external links, and ClamAV detected it as Pdf.Phishing.Trojan. The embedded URLs and the PDF structure suggest an attempt to redirect users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the PDF's nature points towards a social engineering attack.

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://traffnew.ru/strik?utm_term=sig+sauer+p230+review PDF link annotation
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/bapavofin_panewolomidiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5fbd844e9b9ad.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/f8ec4c33ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_5fab35a50e944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5fad3e4f70819.pdfIn PDF document text
    • https://nepajomawowezuw.weebly.com/uploads/1/3/4/4/134462508/napijaxamirasomiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5f926a2bac5bd.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/rikaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f9710b17342d.pdfIn PDF document text
    • https://nifimesatixat.weebly.com/uploads/1/3/4/6/134668674/aec7a1bb36ed9.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/5d8e73eb-630a-4e13-a07e-7cd47d842b8c/timadododimutuvufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecabae0b-39b4-47c0-bfbe-cce255551a62/taking_boyfriend_applications_meme.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB40 4268 bytes
SHA-256: 7c96c2d96a4cf0e330a8fc2fd7e2ffb2d2c25a10952b57c553bb5eced3ea682c
font_01_sfnt_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 5648 bytes
SHA-256: 5df1c38cc771904a40604ac48e44c05ba7b7c1a411756c21bc179b06694e5d0a
font_02_sfnt_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 10860 bytes
SHA-256: b6154f1ae16a6feb16803e43a21bd7ff308f9e951011ca5bf1313e7c27a7445e

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