Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6e577607ec4265…

MALICIOUS

PDF

46.4 KB Created: 2020-11-06 05:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57275745bfdb732344a43a010e543350 SHA-1: 7478c68d27fd2951a3a5f8d43cd2f7130c99f5cf SHA-256: 3b6e577607ec4265a3604c341c6589adf593eb4a3a774348dfd4c0a97750a0e6
116 Risk Score

Malware Insights

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

This PDF document contains a callback phishing lure, instructing the user to call a phone number, likely for a scam. It also includes a large number of external links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and embedded URLs point to potentially malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/123?keyword=healthmate+forever+instruction+manual
    • https://jirunemopisitex.weebly.com/uploads/1/3/4/3/134332051/sopisaxidini-xikiwufexuti-pojev-luzominimisug.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f87a4ac7689f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9c8f438a-9c19-4f43-b343-7cd8c1ee6c13/25323048301.pdf
    • https://uploads.strikinglycdn.com/files/e554a4c1-f740-4c2d-94ea-e465d1478081/pizevimagametavi.pdf
    • https://uploads.strikinglycdn.com/files/35682660-ddae-4e74-b3e8-4311df5e068f/doziwekunidobuberopepe.pdf
    • https://uploads.strikinglycdn.com/files/477fcd32-814b-4b94-92ae-c49f46c40a4d/kufegi.pdf
    • https://uploads.strikinglycdn.com/files/67d7c8d2-4fa7-4e08-9f6c-0cb83ec4e10f/14583027042.pdf
    • https://uploads.strikinglycdn.com/files/3c0ca7b8-4f9e-4808-9594-fa59d997d2e0/rurimox.pdf
    • https://uploads.strikinglycdn.com/files/495b0b91-4039-4443-944f-56aad751027c/76065919756.pdf
    • https://uploads.strikinglycdn.com/files/a6203549-00a7-4935-826f-4838c142d653/zameputifenafuzag.pdf
    • https://uploads.strikinglycdn.com/files/aa45881d-ae44-4ad7-a01f-85309548b1d3/great_expectations_study_guide_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0503/1840/9911/files/wagaripur.pdf
    • https://uploads.strikinglycdn.com/files/f3b5967b-9ec8-4601-8ca5-5c8c2d8b8d8c/diario_la_libertad_barranquilla_judiciales_hoy.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075cc.bin
f96e7573a2db311f2d7f4a176586bad788f73171322d62a40084293b70e91f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 5140 bytes
font_01_sfnt_off00008725.bin
989361e856a471ce7fed810fdc4552ff6c598c3700372144e69a734716863745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8725 11076 bytes

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