Malicious PDF — malware analysis report

Static analysis result for SHA-256 298fc6f3db82945c…

MALICIOUS

PDF

70.2 KB Created: 2021-03-09 20:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2530e9c086c96e994feb0931a8100395 SHA-1: fb488d47085a15da8a1dd9427d97a736d9dab431 SHA-256: 298fc6f3db82945c86256f6459a98fe67a10a548db7b7eac08ea205d0a8b8c1f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier and ClamAV detection strongly indicate malicious content, likely related to phishing or malware distribution.

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 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.
  • 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://vilenefex.ru/aws?utm_term=proform+995i+wifi+setup+card PDF link annotation
    • https://cdn.sqhk.co/wetewajaba/dAibhbN/zapoxevubex.pdfIn PDF document text
    • http://inostrana.com/tufezubiboguneshr9ck.pdfIn PDF document text
    • http://4gusevshop.website/zagewujitggew.pdfIn PDF document text
    • http://shtancircul.site/970847629252znbb.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/sifjeia/zipoxejakerosu.pdfIn PDF document text
    • http://mivetys.xyz/agni_natchathiram_bgm_freez4xv0.pdfIn PDF document text
    • http://picfs.com/1bl7zjIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_b8b081145df24489ab2d744993b5cfad.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_04de6ed6cd854ca8a49e4dd5d8db8dac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/amaranth_plant_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/69045128453.pdfIn PDF document text
    • http://gonatiw.rf.gd/ragurowegejipeloxita.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/50599197764.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/ronerinez.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/business_plan_executive_summary_example_startup.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_506bbfa0e7c34851b5cac07ac247fd59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/murudute/dirty_words_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/jira_cloud_release_notes_template.pdfIn PDF document text
    • http://zovawawopo.rf.gd/28799358724.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_off0000d2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 5640 bytes
SHA-256: a92520662e3d6f9ebf86060247821e279d19603d9c21621a4c575d0ba596ea62
font_01_sfnt_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 11064 bytes
SHA-256: 24b697a53bcd966aa7a6ead7bca622c0b0685cc63f3a7d88bfaed8e1e4893074

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