Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0058e48f19d4bc9…

MALICIOUS

PDF

80.7 KB Created: 2021-05-23 10:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d9166c09c5f9024d1d6658b7503882ef SHA-1: ef6b17bb39453e7b04c94da7dc0156fe91561d9b SHA-256: c0058e48f19d4bc9f9208004ed566106354bb3cbfb75ef8a4bdfaac17edfba56
156 Risk Score

Malware Insights

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

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 0.9961

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://soxebez.ru/strik?utm_term=cessna+172+maintenance+cost PDF link annotation
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/videwaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_605394014a437.pdfIn PDF document text
    • https://woxexawunum.weebly.com/uploads/1/3/0/7/130776255/4615145.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/7872039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475376/normal_6058baa0cc20a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_6034d370926e1.pdfIn PDF document text
    • https://sadavofabuloxus.weebly.com/uploads/1/3/5/3/135316226/konajig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_604185fcd95a9.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/14e87a39-f435-4db5-85f7-6394eb32e7a6/frigidaire_fad504dwd_50-pint_dehumidifier_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c460d9ef-fdb6-416a-8919-20e363a329a9/88247033063.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/apc_back-up_500va_bx500ci.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0c435f-ff81-4f20-b4a0-2788ec559f93/67719556830.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/48045645930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94af8f8-8090-43b2-b0ad-6a207fc2a047/xobupirosiwidisexisedib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4f8116-ed88-45ec-a207-28b6124c8cac/will_cyberpunk_be_better_on_ps5_or_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/zunuribogivedivolomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb9dc1fd-36a1-4f64-b21c-a3ba20f83ef9/how_to_stop_a_squeaking_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3882e3-9ed4-41e9-9324-33378ee11d08/75073949212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf8fc16-9336-4124-9e3a-f60bcb774174/litisumabirekulikazefo.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/topasipuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7d617f-f92b-4f9f-a1ad-61f0fdb672d7/43292606703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a87db9e8-83bf-46c6-9703-4cf72b7b07ea/woxirefari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7a3fd1-63c1-4411-8241-853d943673d5/tamunodulekexikeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a1bc6a-9b3e-4939-852e-e2df77bc4bd3/wupofekesoxuluzisifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ac1aba-7909-410f-be6e-0f2e9fa03df9/polaroid_iso48_waterproof_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/indeed_resume_template.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_off0000f99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99B 4988 bytes
SHA-256: 2e63a41bf2d43352c882f38f7224676af5ccf67e5067a6792a009eb78c82b243
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 13044 bytes
SHA-256: 24e039ce025327ce81bf7be32c98bdf43e05bc8a0cb52706e0e691a17b6474ea