Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce29aaca9f530a20…

MALICIOUS

PDF

78.5 KB Created: 2021-02-18 02:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c77fa8fbd729890315abfc264d7958eb SHA-1: 4a7503d348ac2cd7c0868556aeedd4e79aa07920 SHA-256: ce29aaca9f530a20619acc7f9c67202bd384a7678551a52b9a3a493291893b69
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, with a high-confidence heuristic flagging it as a link farm on disposable hosting. The primary malicious URL identified is 'https://baarspo.ru/strik?utm_term=sig+p229+legion+rx+compact+review', which is likely used for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, contains text fragments suggesting a review, which serves as a lure.

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 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://baarspo.ru/strik?utm_term=sig+p229+legion+rx+compact+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5ffce42988cae.pdfIn PDF document text
    • http://subbellassecret.com/whale_talk_chapter_10_summaryyaen4.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/2804591.pdfIn PDF document text
    • http://civiliscmq.online/4627390322440mwp.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/mjfjiFi/kulagawepivumawokode.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/puruvogib.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/00511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_60123f3a675ba.pdfIn PDF document text
    • http://com-signto5.xyz/jasepoooa8s.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/4ZShi8c/ge_bluetooth_outdoor_smart_switch.pdfIn PDF document text
    • https://gedikitol.weebly.com/uploads/1/3/4/9/134901051/388219.pdfIn PDF document text
    • http://giveaway2020.info/gewixajetipojulilaeq224.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kotidaw.epizy.com/21082953618.pdfIn PDF document text
    • http://lemagokumir.epizy.com/h2o_x5_steam_mop_specifications.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_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 5688 bytes
SHA-256: 2231ad43350ca9ae17beb8087dd3f5d38e28b11c661d1f014b6d31ffef74b185
font_01_sfnt_off0001083c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083C 10888 bytes
SHA-256: c504cf5f03ad6815dd3eb61e550276814ee764a04cc5d330124e8d26ce10f4e0

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