Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed17d68b7e19d225…

MALICIOUS

PDF

90.1 KB Created: 2021-02-27 16:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f2d98c81e176d163048494c737edfd6b SHA-1: f04f47632116b4d914da6b6018bd11397f9007ff SHA-256: ed17d68b7e19d2252a02abae459fae3d5e779a7020e1132d674b27f07a57998a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous external links and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/award?keyword=2003+lincoln+navigator+owners+manual+fuse+box PDF link annotation
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/julupesogusogusif.pdfIn PDF document text
    • http://idealica-ituficiale.website/javascript_visual_quickstart_guide_9th_edition_downloaddl7n0.pdfIn PDF document text
    • https://lojefumelo.weebly.com/uploads/1/3/0/8/130814401/4823803.pdfIn PDF document text
    • https://vixevugipun.weebly.com/uploads/1/3/5/3/135327752/nojisuxafamuzuj.pdfIn PDF document text
    • http://jumpfs.space/vudebosegafopqkyek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467005/normal_5fd82806cef22.pdfIn PDF document text
    • https://zigibopujomez.weebly.com/uploads/1/3/5/3/135350997/d6846a5a07e.pdfIn PDF document text
    • http://sy0n.icu/nora_roberts_book_list_in_chronological_orderj7vbr.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/5470727632649bb0.pdfIn PDF document text
    • https://molowusutet.weebly.com/uploads/1/3/1/3/131380828/9812002.pdfIn PDF document text
    • http://theharaka.online/nezuxoregabodisatugilepbr2s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_601b1cca6ce20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5fdec82436f21.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/178a0b7ced311.pdfIn PDF document text
    • https://xunumiselodaz.weebly.com/uploads/1/3/0/7/130775676/284788.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/jufakilojarexikuduvupogoqd16d.pdfIn PDF document text
    • http://cosmicgig.com/dibosuqafmq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426830/normal_5fd805bc66ac2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zelusovudexa.rf.gd/kirotukise.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_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 5904 bytes
SHA-256: 6c081e371f857da7775c916b1715968f52b9af59873bbef0ed61d192e126c3ea
font_01_sfnt_off00012e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E54 13792 bytes
SHA-256: 3d477b009d0b5b603cb8216ffe3885c243e7d11f86ba6c86e01b0cac37347d3a

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