Malicious PDF — malware analysis report

Static analysis result for SHA-256 14007feb8d8739fe…

MALICIOUS

PDF

72.8 KB Created: 2021-03-01 03:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0b501e72d5a7eb3e9becbce8f574f42c SHA-1: a13a2d2b10540e4aee6f66fc3c4d2157e431bfbd SHA-256: 14007feb8d8739fe88e6c2e4ff4e0329da11bf54fed916395a33b6b8050c08de
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 ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a deliberate attempt to obscure the final destination and potentially distribute further malware or conduct phishing attacks.

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://botokaw.ru/award?keyword=sharp+objects+gillian+flynn PDF link annotation
    • https://cdn.sqhk.co/potasuregoz/jcfihjb/mural_of_kobe_and_gigi_in_los_angeles.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/fjjP2g6/pagijuvez.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/h4VyLgh/gumipagulelu.pdfIn PDF document text
    • http://lianhua.life/22852590380rmj01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_602da182a7420.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/iicBjj8/how_to_decorate_a_cake_at_home_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_6027cd344374a.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/jiwerugojexamufuvija.pdfIn PDF document text
    • https://cdn.sqhk.co/kowukogifaw/gegi5MI/ringcentral_meetings_join_from_browser.pdfIn PDF document text
    • http://vseti.life/34107370206g1c8u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469824/normal_6026a95e52271.pdfIn PDF document text
    • http://pedron.fun/how_often_are_dividends_paid_fordvdzdn.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/hhYzhjd/ketenesajineki.pdfIn PDF document text
    • http://realwockyc.info/usb_webcam_app_androidwly2k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5fef0bbed6d60.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/toxogibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/running_to_lose_weight_mens_health.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/sovepakegazarujiberivu.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_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 5700 bytes
SHA-256: f56d761000146194e81996b3bd5ddb243e250234c1ff812f7ed067ca6ce14397
font_01_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 9988 bytes
SHA-256: 88ff7ecb7c67dfa56231acfe812b403c867db4f78908c1e7bb70aaa6ea8c93c3

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