Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80ebe19a47ef58a…

MALICIOUS

PDF

87.2 KB Created: 2021-05-15 07:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b9cb5b6bdf846b9b0d3ba5f3c0d11be0 SHA-1: 3cdd4ff0c3f6f3eba4b8f429ef6ecbd54c25eed1 SHA-256: a80ebe19a47ef58a7c1fa4d24c318c57913df5bcac6ff0ef987a11a7bf0a86dd
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely intended to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=roman+mythology+monster+names PDF link annotation
    • http://instgrmmverifiedbadge.com/jim_jones_and_the_righteous_mind_reviewjk01n.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/5033148.pdfIn PDF document text
    • https://wadidomewagu.weebly.com/uploads/1/3/2/6/132681938/zidixigaji-vusevifotal.pdfIn PDF document text
    • https://moxusovilala.weebly.com/uploads/1/3/0/7/130738705/b717f3.pdfIn PDF document text
    • http://xosuvirakogaf.iblogger.org/dajidimugejifabetanimaja.pdfIn PDF document text
    • https://siwelizotelet.weebly.com/uploads/1/3/1/4/131437983/5841659.pdfIn PDF document text
    • http://study-english-04.space/bulasaweml4b17.pdfIn PDF document text
    • http://tokio-2020.fun/27394952364v84lc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/furunumaroxun/toshiba_satellite_l750_review.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/rojudapuvogivupa.pdfIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_34791c6d98274b21a43433ea6c8c1ae9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/guidelines_for_hypertension_in_elderly.pdfIn PDF document text
    • https://2c0370cf-43ec-4dc9-8589-ec1e7793a70d.filesusr.com/ugd/404058_7baed743df294c6094b847508d36e716.pdf?index=trueIn PDF document text
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_80b04749b90c48248dd2afeb3411cc18.pdf?index=trueIn PDF document text
    • http://roxifopovarag.rf.gd/49885968914.pdfIn PDF document text
    • http://fosixokosed.rf.gd/gedisamamomupi.pdfIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_813b6084b720491ba2840dfc331d5786.pdf?index=trueIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_e35b733c944e4109abc302f38430072d.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001092d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 4948 bytes
SHA-256: 58db4f43ba0f4d8716af986b12f0cef04056dc8157212b1250a4dfc02eaa1c91
font_01_sfnt_off000119d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D3 12412 bytes
SHA-256: 07570b138bcd3b9f56c3c8850afc10acb24a57c4cf0e9638a74a8a4ddd74469c
font_02_sfnt_off000141b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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