Malicious PDF — malware analysis report

Static analysis result for SHA-256 f242a09e168681ae…

MALICIOUS

PDF

69.2 KB Created: 2021-02-21 13:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0360ba6ba3be5158d6aaab7d6eddbbbb SHA-1: 1ccf9e3b2ac123be521b695697db5b25e7f5e279 SHA-256: f242a09e168681ae525b58699dc3b762aad460f3c50e5a5dd81d3452405d88f6
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, indicative of a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

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://druttle.ru/wix?keyword=body+beast+build+shoulders+worksheet
    • https://gunesuzupe.weebly.com/uploads/1/3/4/6/134679160/2b9995dc09.pdf
    • https://wixalotoduf.weebly.com/uploads/1/3/5/3/135305273/lexexedo.pdf
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/518155.pdf
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/fodatenelumo-jepuwuva-gegapasusude.pdf
    • https://cdn.sqhk.co/gejixoneku/bQihjeS/80212144416.pdf
    • https://cdn.sqhk.co/fewibefanid/vzgcoNY/war_of_the_worlds_1953_movie_script.pdf
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/wiwup-wowodima-fetevuso.pdf
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/20998.pdf
    • https://wadasowodasi.weebly.com/uploads/1/3/5/3/135316150/2fe5ccd84d9d2e3.pdf
    • https://latiratigu.weebly.com/uploads/1/3/1/1/131164156/b4807b8.pdf
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/pituvoburavijijo.pdf
    • https://sizadefo.weebly.com/uploads/1/3/4/3/134381744/3392f.pdf
    • https://debefapedokofip.weebly.com/uploads/1/3/4/3/134373265/1044671.pdf
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/3049646.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tumasun/urinary_tract_infection_in_pregnancy_guidelines.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_off0000d266.bin
b1ff54024533a4da9daf2197bb7b67a285fefdb69809554b2ce76b198f032346
pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 5360 bytes
font_01_sfnt_off0000e4ae.bin
1652fa83a12d97fca77d38c22c3a3f9fd128616cc140d9cd72903d726442826c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 10292 bytes