Malicious PDF — malware analysis report

Static analysis result for SHA-256 09790114dc15c9ce…

MALICIOUS

PDF

74.2 KB Created: 2021-05-23 22:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9a54fc2a49c6a9dee86d392cbbdb8553 SHA-1: 11a0a22ce13eb326eecaea2ed200a24d07ea5fed SHA-256: 09790114dc15c9ced998d0d10123a4b62662f90e1c13c31e87f35898a7222a57
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a guide for resetting a car's oil change light, a common pretext for phishing. The presence of ClamAV and ML heuristic firings further supports its malicious nature, likely as a phishing document designed to redirect users to malicious sites.

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://baarspo.ru/strik?utm_term=how+to+reset+oil+change+required+dodge+challenger PDF link annotation
    • https://kaxebovirufuj.weebly.com/uploads/1/3/4/3/134399635/1f4f818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_6035b0ec73808.pdfIn PDF document text
    • https://webexozaputer.weebly.com/uploads/1/3/2/6/132681415/5278627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_6049bfd5cc387.pdfIn PDF document text
    • https://rexaririwe.weebly.com/uploads/1/3/1/6/131637114/8105150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426261/normal_5fca7f8c25f03.pdfIn PDF document text
    • https://mibiduzomezo.weebly.com/uploads/1/3/5/3/135327428/2626398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470521/normal_60546e0a636be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_6034ffee63f47.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/kavoxaw.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/836ec88d-3d97-4323-ae9c-f1b489756edc/velasimadotul.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/17040941533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4aafff-68f6-4623-ab0d-7d1ef9da4e60/what_does_app_mean_on_your_cable_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459dcb84-554f-4f9f-b0a2-dfb409573e38/81750453565.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/antigen_immunology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab01c42-1327-4850-a36a-38822393f5fe/what_is_science_of_logical_reasoning_in_mathematics.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

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_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 5380 bytes
SHA-256: 695df5338eeb84bea90076b2244fbb2ba670375d3e68ec0917c38b038e97fd56
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10276 bytes
SHA-256: 8a1a34dabca8ac3b4681b3560e337102fc2f4413c24beaf10fc084a7c5c667d9

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