Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9318d7b79e92a63…

MALICIOUS

PDF

75.3 KB Created: 2021-02-19 12:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7c855facda8a761e898bb378447d180f SHA-1: ed38b69cbc993814f65303dc65370feb4f0dfe39 SHA-256: a9318d7b79e92a633b59a9bef02674d686ac08f1e50ee9c4a925a67cd908a35c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into navigating to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=download+novel+eragon+2+bahasa+indonesia+pdf PDF link annotation
    • https://zukikopan.weebly.com/uploads/1/3/0/7/130775822/zatuvotag.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/xojumefosanomas.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/aijFhal/18912935485.pdfIn PDF document text
    • https://vipozuguru.weebly.com/uploads/1/3/1/4/131483083/xakawewetopa_rubojo_lowanu.pdfIn PDF document text
    • https://bumibaniligaza.weebly.com/uploads/1/3/1/3/131383581/tilipumis_nolupitagaviku_nigeronekurabap_kofomuwaxazu.pdfIn PDF document text
    • https://taduvovu.weebly.com/uploads/1/3/1/8/131871704/wesubalig-lazojulur-wojavaf.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/RK5uggM/word_calm_daily_challenge_september_13_2020.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/47327915113wr77n.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/sexotomazowuk.pdfIn PDF document text
    • http://flowerport.store/zp84q.pdfIn PDF document text
    • https://lazabegikazake.weebly.com/uploads/1/3/5/3/135315211/27129453.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/Egjfrjc/dave_banking_for_humans_stock_price.pdfIn PDF document text
    • https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/luxulomamu-jiwesajis-makim-jexevalifalegi.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/tojerigaxofukugemiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojuzixe.epizy.com/xujujanifusikamufunanotup.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/96233491520.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/42907747647.pdfIn PDF document text
    • http://rizaxofu.rf.gd/jatusesez.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/64785085726.pdfIn PDF document text
    • http://nixozokusujuku.epizy.com/fssai_candidate_login_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/al_mulk_rumi.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_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 5724 bytes
SHA-256: 644546fd73a84ccaa792abc7ac652899777ea3ffa49581589ec762894b254401
font_01_sfnt_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 11000 bytes
SHA-256: fc1fc56b467cabe8b08eef67f1d38669905b81dad2b9c7c6eacd6267fb484305

Open this report in the interactive analyzer, or submit your own file for analysis.