Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b30b921ab2d3cd…

MALICIOUS

PDF

70.0 KB Created: 2020-12-03 00:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bbac11965e4b4ab6f2e18fecea7f9ff SHA-1: 9dba1cf0868cc3da00b4441ffe27ac57beaefce7 SHA-256: 73b30b921ab2d3cd2d1b2628eca7b269f78a258e7f8ae158309f8f72e2861894
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. The primary malicious URL identified is trafffi.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=mccollum+high+school+football
    • https://cdn-cms.f-static.net/uploads/4451228/normal_5faff039d9617.pdf
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fc6acdc9134d.pdf
    • https://cdn-cms.f-static.net/uploads/4416935/normal_5fa0ffea5bbec.pdf
    • https://dilomosef.weebly.com/uploads/1/3/4/3/134316650/5033009.pdf
    • https://static.s123-cdn-static.com/uploads/4476757/normal_5fc6b03adcb2d.pdf
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/losagoso.pdf
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5f9b35c06b76b.pdf
    • https://tudekazesabi.weebly.com/uploads/1/3/4/3/134367585/kisetiwu-reseta-winapitila-zivogomuvo.pdf
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fa4ff267308c.pdf
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/985034f45a2ba4.pdf
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5fb6dbeb78204.pdf
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/323393.pdf
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5f9b0322a7d7c.pdf
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/puwavika_lizobe_jomak_nenibawupowupan.pdf
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/aa0d95dc74af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0bb3c02f22b9dd248a0/1606283452429/61708251855.pdf
    • https://static1.squarespace.com/static/5fc0cdab3398ff75152d912c/t/5fc0f39d9b1ed03538fdbd4a/1606480797936/fiwosodibiporojedobe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d58c.bin
ce5636210d3a8b5b92c19d14231964ff7d905c242cc4684b44b0d3468f6e552a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD58C 5344 bytes
font_01_sfnt_off0000e7a9.bin
e5895a6a05e8ad9e14aeefadc6c41216e59432d60fec4597b409fd4349780696		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 10328 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.