Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8a7ecf10fc654d…

MALICIOUS

PDF

80.5 KB Created: 2021-06-12 22:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8b466aca812a52a57b6f6b61fa3b0afb SHA-1: 544a9952829e71f6bce203ef785c48de9c1ff43c SHA-256: 6d8a7ecf10fc654d41baa0a2efb3af0638222b37bf5a0ec74c6819dd45ecb58e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The embedded URLs likely serve as lures to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/pbw?utm_term=chauvet+xpress+512+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5fcd539609885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_6057e8fce18d4.pdfIn PDF document text
    • https://riledamulobav.weebly.com/uploads/1/3/0/9/130969772/ruxumaruzapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_6017163c70e73.pdfIn PDF document text
    • https://luvinazomefad.weebly.com/uploads/1/3/4/3/134308035/vameduke.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/2cff04c3955d10.pdfIn PDF document text
    • https://bisijonowazupu.weebly.com/uploads/1/3/2/6/132682684/joliwowibomog-lezewuzijaven-sofuwijarupipi.pdfIn PDF document text
    • https://degufulu.weebly.com/uploads/1/3/1/3/131379990/virolerifududoko.pdfIn PDF document text
    • https://zomimodobi.weebly.com/uploads/1/3/0/7/130739583/2167190.pdfIn PDF document text
    • https://sovinupuni.weebly.com/uploads/1/3/4/7/134762808/7211806.pdfIn PDF document text
    • https://penotogales.weebly.com/uploads/1/3/1/4/131438478/37b3931.pdfIn PDF document text
    • https://jofufibiwew.weebly.com/uploads/1/3/5/3/135347649/jadab.pdfIn PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/sajopura-devekubezo-rasafo.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/vajize.pdfIn PDF document text
    • https://jevuzukolusiwu.weebly.com/uploads/1/3/0/7/130739503/e9281b28bb0b2e.pdfIn PDF document text
    • https://sadaxolofomet.weebly.com/uploads/1/3/1/4/131453623/risegupavexiratipiwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fe481c840953.pdfIn PDF document text
    • https://fufuwotasivixi.weebly.com/uploads/1/3/5/9/135966690/ae2f7fa.pdfIn PDF document text
    • https://moxisubisoxotap.weebly.com/uploads/1/3/4/8/134893280/df0990e16a4b.pdfIn PDF document text
    • https://waniwuwaweduf.weebly.com/uploads/1/3/4/3/134348957/3341225.pdfIn PDF document text
    • https://moninedowilex.weebly.com/uploads/1/3/1/4/131436981/lobuketovosid_gamapotosejus_fapomovexotaw_dizenixim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bevosox.pbworks.com/w/file/fetch/145102740/gunilawetabej.pdfIn PDF document text
    • http://tekitejug.pbworks.com/w/file/fetch/144670782/23644289887.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/maine_pyaar_kyun_kiya_mp3_download_pagalworld.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144595341/5793951883.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/f/bunch_formation_playbook.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 5400 bytes
SHA-256: 7aebff59b1a1af47303535c9925a06cd8dce408f45a6837c42839a1ab48ecf9a
font_01_sfnt_off000109fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FC 12684 bytes
SHA-256: 0ab202614c2a31913a41c67033beebe23ee8bd900aa94cd86b5da861de36022d