Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e874d9c7e0ef23…

MALICIOUS

PDF

71.8 KB Created: 2021-03-25 14:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6270fe8355baa7eb95b8315c4eb8f733 SHA-1: b3be96513d1d08494d1d2b5194744869f6693208 SHA-256: 60e874d9c7e0ef2352781a712a077f7e382175f31643d3c310162eba1caeead1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic indicating it is part of a link farm, with numerous external links, one of which is a search result for a common appliance issue. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links point towards a social engineering attack.

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://golowaki.ru/strik?utm_term=whirlpool+top+load+washer+won%2527t+drain+or+spin PDF link annotation
    • https://cdn.sqhk.co/bagadogod/huaUold/97402730421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_600e696b3c09f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453909/normal_5ff8a4fb8adc3.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/how_to_reference_online_journal_articles_in_apa_format.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/eu8hfig/jukabasat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_6035d8c18f54b.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/duxivugesurona.pdfIn PDF document text
    • https://narokijobuwixe.weebly.com/uploads/1/3/4/7/134738868/1276198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426277/normal_5fca7e1721023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/gesobukudulekedefa.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/62844683213.pdfIn PDF document text
    • http://zozupajekuledus.myartsonline.com/artropodos_de_importancia_economica.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/how_to_use_big_green_egg_deep_dish_pizza_stone.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/boralo.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_off0000dd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 5184 bytes
SHA-256: 1a69c41d7074856712188d80305597c507c943ace4698cb4411fb06ad53370d2
font_01_sfnt_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 10392 bytes
SHA-256: ec05df91e2f8b70534722c7560cf4a578d225203f863b2a1494b43c08c7c6ed6

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