Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a0d43beacbc6b0…

MALICIOUS

PDF

101.4 KB Created: 2021-05-05 22:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f6db41ea4ec4d9a47f96828c82512883 SHA-1: 29645f0daa98e6576bdf985d567d9b23c9e1789c SHA-256: 96a0d43beacbc6b0ff636e4298e38ee37d36f65f7d13f93d4e3864fb1b487be1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=tragedy+of+great+power+politics+review PDF link annotation
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/air_force_academy_map_colorado_springs.pdfIn PDF document text
    • http://kisedevobale.22web.org/boss_altbalaji_episode_2.pdfIn PDF document text
    • http://nesejanemik.22web.org/25416105068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_0baa5e519bfd4693a19824a43ca881d3.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_f127b04b915a441d8d98ffb3aab9921c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/703e90f5-f596-4a09-ad40-713c1e9208e8/mechanical_engineer_role_in_manufacturing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f58dc04-f2be-42e2-9834-aed201e21904/what_kind_of_grease_to_use_in_kitchenaid_mixer.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_f279afe0251a4adf89f3af34a5ec50f2.pdf?index=trueIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_5d771c5defcb4ba3b204d8ff542b04b0.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_4b85c783fbf2409e82c84b6af01d3cec.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_85625329fb6d442a9484f40361138b84.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c62a9e2-fe46-4c56-9348-8dbbc64d3a15/55510466458.pdfIn PDF document text
    • http://kofipazefoleris.epizy.com/recursive_sequences_worksheet.pdfIn PDF document text
    • http://roduteberilexel.epizy.com/wigunale.pdfIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_7f053a1c0d764021ab0909145ce80412.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_d94477287b474c9087da81d1aed4fe14.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b64a5d3-a952-4ee2-a019-28dc5a565d5f/67470985202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3d18db-bf70-4115-bd5a-d2afed8449d2/jemoranejinolezavijadisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a358bd1-4b34-4ac4-94e8-0b9cc104ba26/88068293822.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001359c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359C 5528 bytes
SHA-256: 022fac14fa90e63c8afa9a87103dcdb6dd3b9ce1cd759a3d1c887acd0aa29218
font_01_sfnt_off0001489b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489B 11824 bytes
SHA-256: 0e5a0992eeba15fc5f5f6351ce3d60e66bbe1a077b28365be799889773e74137
font_02_sfnt_off00017138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17138 16060 bytes
SHA-256: 660d05b38fea380e8cc13f4a5a7db764e9bd2a20a73145a73af50c118749f22b

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