Malicious PDF — malware analysis report

Static analysis result for SHA-256 579abfd03b119c5e…

MALICIOUS

PDF

80.3 KB Created: 2021-04-29 07:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c7c6f78d0c8723ce51ebec32af52a9b SHA-1: e04a90651b9d88cd5ca8edc3ddf122986e86066f SHA-256: 579abfd03b119c5ef16aaeb26d4192c5cd1ed9c2e8420371d7c148c387d10282
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a potential for further malicious activity or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=dark+souls+3+wiki+faith+weapons
    • http://fepegabilufe.iblogger.org/python_2._7_4_for_windows_7.pdf
    • https://cdn-cms.f-static.net/uploads/4372707/normal_6012430837f07.pdf
    • https://static.s123-cdn-static.com/uploads/4413842/normal_5fec8b9228507.pdf
    • https://babixugopanodip.weebly.com/uploads/1/3/5/3/135382952/3463238.pdf
    • https://zezojafoxivofed.weebly.com/uploads/1/3/4/5/134528913/3028878.pdf
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fe027ea5acfe.pdf
    • https://static.s123-cdn-static.com/uploads/4469633/normal_5ff8fff820533.pdf
    • https://cdn-cms.f-static.net/uploads/4419847/normal_6056a64ecf943.pdf
    • https://cdn-cms.f-static.net/uploads/4382643/normal_601330bfaaa92.pdf
    • https://cdn-cms.f-static.net/uploads/4484995/normal_60571b85e728a.pdf
    • https://cdn-cms.f-static.net/uploads/4470211/normal_5fd34dde5c994.pdf
    • http://lovemecompletely.com/91992978014neu84.pdf
    • http://mmmmmme.space/answer_to_complaint_sample_californiabzynr.pdf
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/jamiwus.pdf
    • https://cdn-cms.f-static.net/uploads/4459916/normal_603673adde23a.pdf
    • https://cdn-cms.f-static.net/uploads/4379842/normal_605c50255af9b.pdf
    • https://cdn-cms.f-static.net/uploads/4463277/normal_60442448861dd.pdf
    • https://cdn-cms.f-static.net/uploads/4465702/normal_60588cb7b5803.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://puxezupokefip.rf.gd/cornelius_castoriadis_biografia.pdf
    • http://winefop.epizy.com/wastewater_treatment_and_technology_forster.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee77.bin
3dca7650c8eb9fd2398a891ba0114e0f3d9ff3d66cc485b72745d1eea45fca12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 5188 bytes
font_01_sfnt_off0001002c.bin
90edc0d1cf0404df4f3454c8c1efd84917290e38013771eec6047f7f1b1d9bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002C 10812 bytes
font_02_sfnt_off00012549.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12549 4324 bytes

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