Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae60b42c6d6c396…

MALICIOUS

PDF

85.7 KB Created: 2021-03-10 04:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 60f2cde5ee1f7d8066cdf4c6b3e58bd0 SHA-1: 590353d75e9b02da0a5a8ca95397f9f22325be8a SHA-256: 2ae60b42c6d6c39663bc527b5ae4793ed818aaac56971db22968662d7cbafee1
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, indicative of a link farm used for SEO poisoning or redirecting users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern designed to exploit user trust through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://golowaki.ru/wix?keyword=traktor+s4+service+manual PDF link annotation
    • http://gajaxujifusokul.mygamesonline.org/wotam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_601226313aa83.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/6Bifhgm/xivigesiwufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_5fd160998ce04.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/culjjUq/12109180755.pdfIn PDF document text
    • http://sepukolobu.sportsontheweb.net/nomekafep.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/why_was_the_game_show_the_chase_cancelled.pdfIn PDF document text
    • https://mokekisinuru.weebly.com/uploads/1/3/4/3/134366850/torozolukul-kakirevedater-xorafibupizuso-borawi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420454/normal_5fcdce95e1da1.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/rigasowixuju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_91088eaf956646c695ae2b476e56a973.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_767c313dd5d642dab0e17dad018e5276.pdf?index=trueIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_4c2ed8acb4064362bc6a84d19015a407.pdf?index=trueIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_1a1102b7427c46a58c7202b2a16fc509.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuboki/61592158699.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_7a34ef1da7cd4471b323b70dc6cbc3ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/87086042201.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/tisixazenevemekezafe.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/pretty_good_vs_very_good.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_off00010e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E67 5104 bytes
SHA-256: 5ec74d8d1ae2d5bd4af1a7b1f5ff6aa08312e9f9e2e0bef46bc03f2bf5cb22e1
font_01_sfnt_off00011fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBE 13212 bytes
SHA-256: bde96294123dc86f3d69030e3cb61c4065dfba272b17c4c094cde57c90cc297c

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