Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef049c462325026…

MALICIOUS

PDF

63.4 KB Created: 2021-02-20 17:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d423e648b4f6f11ee68b00d85f352ef3 SHA-1: b7985650696a6627137a481d2d362245ada565d7 SHA-256: cef049c4623250267ec34829eb953aff4ece96cf9421c67769b27c00068fe035
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains or link farms, suggesting a tactic to drive traffic or host phishing lures. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the primary function is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=2014+ski+doo+owners+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/vedanoderifu/ijhceXH/emirates_skywards_go.pdfIn PDF document text
    • http://gogadozuxigode.iblogger.org/jose_chameleone_basiima_ogenze.pdfIn PDF document text
    • http://coins24h.com/gesulonaj3jl2.pdfIn PDF document text
    • https://ximesadi.weebly.com/uploads/1/3/0/9/130969353/ee1cc3202f.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/OBbVjjq/xusomolafivukixuwipapoxot.pdfIn PDF document text
    • http://socialwave.me/lovekiworova4lspz.pdfIn PDF document text
    • https://cdn.sqhk.co/murefazomejo/ahfL77H/new_york_and_company_clearance_summer_dresses.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/FQgcigT/fit_the_fat_2_hack_apk.pdfIn PDF document text
    • http://dewemopiwofim.22web.org/unconformities_in_rock_layers.pdfIn PDF document text
    • http://select-get.top/los_numeros_decimales_4_primaria_ejercicios75bpx.pdfIn PDF document text
    • http://potolkilife.ru/217297665132snp8.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/jfHXqii/zikifupajikaluxakuzoleve.pdfIn PDF document text
    • http://daxogupifixago.iblogger.org/25484248845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rozomafi.rf.gd/20903226055.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/dopovufopan.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/vofumor.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/canva_apk_file.pdfIn PDF document text
    • http://filanovedo.rf.gd/how_to_speak_english_conversation.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB990 5660 bytes
SHA-256: bcc340a02cacb764ba349b4c2b80963c130b29e7960a313a8e1dc0012af8a73f
font_01_sfnt_off0000ccd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD6 11128 bytes
SHA-256: 145917c369a160a9520f23be8f1556ebe5958f52fe75be4171c2c9d60db2fd14

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