Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe16564a7d5083b…

MALICIOUS

PDF

71.3 KB Created: 2021-02-22 17:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cdd0d75f0834b699c3f5a060440cc3d1 SHA-1: 21db92a5505a3254170482dd499cab9e64efdb4c SHA-256: ebe16564a7d5083b40ef18e57786f294d5209b6de4cc099cc253f045331cc298
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The presence of these links suggests the document is likely a phishing lure or a distribution point for further malware. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious phishing or redirection campaign.

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://druttle.ru/123?utm_term=origami+mini+book+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467322/normal_5fddce28be365.pdfIn PDF document text
    • http://triple-doska6.club/dezigalutokazawsetrp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_601255d7ecf78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446395/normal_602c6c8e51929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_60205a73a5bdb.pdfIn PDF document text
    • http://blacktea.space/javivuxirusotafva7u7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_6026cd6317a74.pdfIn PDF document text
    • http://starkrobotics.org/stuntmen_2009_movie_review2evmu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5ff6d027ef2dc.pdfIn PDF document text
    • http://runolive.com/nifolurumk5w0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_60131ca1590d9.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/RGiiid9/busijolikozunulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_6015d50d8db86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_6018784e5e783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaguwetu.epizy.com/kefebulotarego.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/rawomipolubegeronumur.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/ramivuxatumasifina.pdfIn PDF document text
    • http://pugijomo.epizy.com/veresodorib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5320 bytes
SHA-256: c29c3251eb784d29f9143824489b36bdef08ab850f581b1b071ef2f639c2544a
font_01_sfnt_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 10456 bytes
SHA-256: 518fcc3a10aa50aa109f57594e1684a4223b3d7edf6005f6d0f294d6de0efe1f

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