Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e086adea5d40bf1…

MALICIOUS

PDF

85.4 KB Created: 2021-06-04 18:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4df5a77265884da53373405c9c3a28cb SHA-1: 7d2bd5628e161162db6253e1db02324c0af9ed8f SHA-256: 8e086adea5d40bf19e9019c1936a811de7f9f9d50c126d6580cbab4e6f9c7523
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://huntic.ru/pbw?utm_term=larry+wheels+training+program+pdf+free PDF link annotation
    • https://nupinowag.weebly.com/uploads/1/3/0/8/130814423/fodugepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_604045f5da004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_601125f7007af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384836/normal_5fe44f5b3d072.pdfIn PDF document text
    • https://zemojedi.weebly.com/uploads/1/3/5/3/135333580/vagunezexewujezol.pdfIn PDF document text
    • https://lodipopigib.weebly.com/uploads/1/3/1/8/131857338/9e4d9e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_605daeabd1398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_60340d7ee33c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382209/normal_5fdfa45c678e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fdc01e9941b1.pdfIn PDF document text
    • https://sagudazotimoja.weebly.com/uploads/1/3/4/7/134753003/jatagalijadasi-mubejudulaxixop-bewasatudimes-suselatasanifix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_603097a3bf417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ff1432b0f57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412388/normal_6018d30628de6.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/7032759.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/0429d7af-0c94-447e-ac10-a1e515c40911/13574974493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edd20b1-ebb0-42b8-9632-57accadf40bf/xonewofopof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f663c25-cb0d-4bd1-ad01-a4bbceecd747/principles_of_polymer_systems_sixth_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85242324-c512-462f-b228-03146c7e9210/1239969612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f378ba79-b26b-46dd-ae70-635a0b6f0bbc/jands_vista_l5_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f532ee-bb55-4f07-b0b4-3d3e3859a257/ielts_academic_writing_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5946380f-60cc-4a1a-a6e2-f46e5dfc1723/describe_the_difference_between_the_normal_and_inverse_spinel_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c446b1-78ed-4297-b32f-a45d3cedf97f/wolf_ovens_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431793ba-62f2-4d73-bccf-c01776dfe94a/61835451163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d9f41a-c819-4de4-9b1a-5a923e142046/dulajanumogerorulugenu.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_off00010e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E84 5592 bytes
SHA-256: c5c9a594ee145907677f28f6c138f95801f9df37c3c3c22eb2831d5d0b4ed388
font_01_sfnt_off0001217d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217D 11208 bytes
SHA-256: 0352ff1bdf670668a90c76fd0dce02541e6864aa055b0014b37099777e70d2ec

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