Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3c0c36c96aedce…

MALICIOUS

PDF

75.0 KB Created: 2021-02-14 14:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6397ac220f3cee3017a9dfa1c4165a48 SHA-1: c642aac7b6cc7cd1417f7bdb3cb748b2ce74bf12 SHA-256: 6b3c0c36c96aedce532241d24496d1d277859e5c22836fe0e3959a325b5e83cc
126 Risk Score

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=pico+pocket+projector+troubleshooting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5fd1c948756f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_601e04523957a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489257/normal_6003bf95b582c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fd0a3f2b4a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_5fd28bd1b3d4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5feea12c16d24.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/69622373692.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/2CwDiec/63732213653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479933/normal_5fe0fd3918026.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/wihhbjj/another_name_for_zigzag_pattern.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sevobademimebij.epizy.com/96653621104.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/transformers_g1_blaster_vs_soundwave.pdfIn PDF document text
    • http://vafotuneg.rf.gd/forgot_guided_access_passcode.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/36350860715.pdfIn PDF document text
    • http://nebugobebakejef.rf.gd/fugimuxebewuveza.pdfIn PDF document text
    • http://difedomuki.epizy.com/wufefobonokifa.pdfIn PDF document text
    • http://pixoriwabivonol.rf.gd/cruel_intentions_movie_parents_guide.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_off0000e5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C1 5268 bytes
SHA-256: 3ac6278af0c95da32cabb3521d8c689c7a4d288f0c7f1ef159c4cfcede319f14
font_01_sfnt_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 11564 bytes
SHA-256: c74a807d8dbb35098c954a461d4f42a317fe06d4e755628d2fddd4a5637a0c98