Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa36c32424fd35d…

MALICIOUS

PDF

81.3 KB Created: 2020-11-25 21:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dd254aabeb903ed27869d5d2d3c96fe6 SHA-1: b81dcaa95368def69a8d5f7fd2eca354731f32f2 SHA-256: daa36c32424fd35da3cb125cd565373d4d1f1ba3969d561f2f535cf073b6f932
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The primary URL, 'https://trafffe.ru/aws?utm_term=soundcloud+go+free+apk+2018', indicates a potential lure related to free software downloads, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/aws?utm_term=soundcloud+go+free+apk+2018 PDF link annotation
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/2bfe47157.pdfIn PDF document text
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/bfc84d56b1f.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/9992339e41992f.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/9944119.pdfIn PDF document text
    • https://zudabipepapob.weebly.com/uploads/1/3/4/6/134672750/c0458944b5.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/wewaropawanad.pdfIn PDF document text
    • https://fobabugukejapa.weebly.com/uploads/1/3/4/5/134576868/8934301.pdfIn PDF document text
    • https://togelugifipa.weebly.com/uploads/1/3/4/6/134648123/e9feed2a85.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/6188754.pdfIn PDF document text
    • https://vejuvofarazaxar.weebly.com/uploads/1/3/4/3/134355137/478623.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/2144969.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/pazifetanegapu/fasesubijutujoweregejas.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/63813844288.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/xawapoxisu.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/gastritis_erosiva_severa.pdfIn PDF document text
    • https://s3.amazonaws.com/juzerilem/titans_bills_highlights.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 5588 bytes
SHA-256: f4bcbe1622f95720da465ca4de7fc2d75f7eb663a2909b9d911b48932655e55a
font_01_sfnt_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 11512 bytes
SHA-256: e42a2182daa177ab7290182162d3cee0984f8f34f97b8f328d8daeef61925c68
font_02_sfnt_off00012826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12826 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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