Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ce483b288f75da…

MALICIOUS

PDF

66.5 KB Created: 2021-05-13 16:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 443c11a73f3a0b660b1cc49df7ddfcee SHA-1: 748b617b9b62b89133127dc56bedbbcd1092db8f SHA-256: 76ce483b288f75da9096a743cf45d75e7a0e29abec3519efa08b8cd4774ad689
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 0.9998

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=hp+laserjet+p4015tn+maintenance+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446925/normal_60326304be02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_6009e6e945b1a.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/2f7bc.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/vapewuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497081/normal_5fc93db254ebe.pdfIn PDF document text
    • https://pufujodixig.weebly.com/uploads/1/3/1/4/131438007/xulene.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/arduino_nano_pin_diagram.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/tefadufijujixanid.pdfIn PDF document text
    • http://sizerasadaxer.mywebcommunity.org/fukoxumapuj.pdfIn PDF document text
    • https://bosebekepomij.weebly.com/uploads/1/3/4/8/134870535/c8827773d63.pdfIn PDF document text
    • http://zagavexakagin.mypressonline.com/kifiwizokulazuwasulaviw.pdfIn PDF document text
    • https://vawalebadafi.weebly.com/uploads/1/3/4/6/134660315/fe93528e218710.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wagadepepixapu.epizy.com/lurelewo.pdfIn PDF document text
    • http://pavadujutupa.epizy.com/10th_class_maths_all_formulas_download.pdfIn PDF document text
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_df38bc308a9b4cc3893b6bf734cef4a0.pdf?index=trueIn PDF document text
    • http://nubibubimalepik.atwebpages.com/technical_report_writing_sample_for_engineering_students.pdfIn PDF document text
    • https://4c69d07c-928c-405f-a1ab-6436392658c4.filesusr.com/ugd/4c264d_7f2cde9b997a4c0697d396fba4ab81cd.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC502 5584 bytes
SHA-256: e80d6f85b4becc35f96bb09f79b1809ca751ab7f152e165c22cb3d83d5b8c79d
font_01_sfnt_off0000d7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FB 10880 bytes
SHA-256: 0c772891781cae80391d2ad87d64a669455f40aaa2175641cd1721d43bfa3e13

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