Malicious PDF — malware analysis report

Static analysis result for SHA-256 200e450fc3b08f6b…

MALICIOUS

PDF

67.3 KB Created: 2020-12-16 11:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1de288f3db515e678e4adde26df7fdd SHA-1: 133cab6151aeb1ae0c76371094dbf37e8f21c700 SHA-256: 200e450fc3b08f6bbba2d1943309a590c0dd2d8591bb0e005847e1badfb3d0e0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on Weebly. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan distribution attempt. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for further payload delivery or credential harvesting.

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://traffking.ru/123?utm_term=daisy+the+great+songs
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/0cee249d4fa6922.pdf
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/9761261.pdf
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/varufonavove.pdf
    • https://pibekexamu.weebly.com/uploads/1/3/4/4/134401786/vurumebojadugaf_difupomonugu.pdf
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/busotegezu.pdf
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/lovufasakiluvo_jubeg.pdf
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/jerebumen.pdf
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/wujejup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ad4c5f0e-e5f4-4d5c-88a9-e22250a9809e/eso_roleplaying_guild.pdf
    • https://uploads.strikinglycdn.com/files/5c99d8fc-eb42-4deb-affd-5dfd5b2a7176/declaration_of_custodian_of_records.pdf
    • https://uploads.strikinglycdn.com/files/9833f3c6-26d4-4eb6-8ff1-d132645ead69/mn_state_fair_maple_grove_bus.pdf
    • https://s3.amazonaws.com/dogazisuze/punctuation_exercise_grade_6.pdf
    • https://uploads.strikinglycdn.com/files/eb02fecf-a639-4b22-b570-85cb87ee61ed/mubinozipuseloj.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe110e7acac6192a882c78/1606291728226/old_dog_bleeding_from_vulva.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_off0000ccc0.bin
9cf5fee1251846cdafb6bb16268cdc8c32b6dbae011c81631218947711459f9d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC0 5016 bytes
font_01_sfnt_off0000ddda.bin
8fd74ae2aeeb944ea8ea03fa4b81519ff07f1b2fb0b42944626d8d4855c0e185
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 10136 bytes