Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa754f1c758f4aaf…

MALICIOUS

PDF

78.6 KB Created: 2021-02-27 15:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d3637eb3256db3b7529a05dcbe987204 SHA-1: 271e705ed335d40b8b0bcb21abe7a1cce9c6a8d4 SHA-256: aa754f1c758f4aaf5ac69c1f241578af50df298d4216a663b757ee5dd4305c10
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of 'utm_term' parameters in some URLs indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=will+cyberpunk+2077+work+on+ps4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410013/normal_5ff0367dd67eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5fd656c3ad2b4.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/iLmBier/dunkaroos_beer_near_me.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/704829.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/hiaibgb/rally_house_kansas_city_missouri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fda99586ded1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5ff2ba2a9f63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_5fdbb6173e109.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/042dce6.pdfIn PDF document text
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/9384970.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/zilewud.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/jiESjgv/novunigobipinufuxosib.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/uppababy_vista_2019_travel_system.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/pedenerulazono.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/aDY4iih/69035893769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jitawidavez.atwebpages.com/36276449465.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/kokekivusevemogozanapela.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/fulugar.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/xasepujifekamozenofosire.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/42860132269.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_off0000f54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 5568 bytes
SHA-256: d0b90084f876498a8eac0e26475f359127739f1e7aa3d8bbd4182a4dedd8cbd7
font_01_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 10808 bytes
SHA-256: 6d0f6e28ccfd28bb342e6f48483cd60833a7710f152bbd95d50b9458f76faeaa

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