Malicious PDF — malware analysis report

Static analysis result for SHA-256 8826180f8ec58e77…

MALICIOUS

PDF

70.7 KB Created: 2021-01-31 15:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bdb4e4d95d7b62805d63f119ccc95f6e SHA-1: c6fbc3a079fe47cd6e5d67ec5517d90c7bbaafe6 SHA-256: 8826180f8ec58e77aed834d7b99df6fbb562f48c8af3bf842cbf8a64017705ba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a ML classifier and ClamAV, as malicious. It contains a large number of embedded links, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs indicates tracking or redirection, common in such attacks. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent.

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://jottigo.ru/123?utm_term=balenciaga+outlet+cabazon PDF link annotation
    • https://cdn.sqhk.co/bijilixiger/l1jhgYO/kansas_gas_service_pipeline_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446280/normal_6004d21e79ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_5fd958668decb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_5fd8189e12619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_5fd9bca42b69c.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/giOggEI/55637498931.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/NgjMhf0/tienda_movistar_el_salvador_celulares.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/Wjh7hsN/marojexefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406168/normal_6008ece272972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ff71521b2a8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490515/normal_5ff22eee6d7ad.pdfIn PDF document text
    • https://cdn.sqhk.co/sazelusup/V3iwNwM/free_brain_training_games_for_memory.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/gfljdjc/pokemon_type_chart_gen_6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudosikewemer.epizy.com/xuwubugunidigewozox.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/38901584777.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/kannada_movie_dialogues_audio.pdfIn PDF document text
    • http://rozakoxufe.epizy.com/3448157816.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/juninetetilemevasekeroku.pdfIn PDF document text
    • http://bevamixebigal.epizy.com/reactive_hypoglycemia_metformin.pdfIn PDF document text
    • http://xebowuruno.epizy.com/69312756229.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_off0000d545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD545 4932 bytes
SHA-256: 1ffc735d939dfe6fdc9645f8998ec958d773da693c7cef7438c060103b55ff8a
font_01_sfnt_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 12028 bytes
SHA-256: 8ef62f6f0f8d679dd3431fc7c7b66c4fd0ec06bb98d51e646406e29e23f78428

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