Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cec5df0c1732a4…

MALICIOUS

PDF

71.5 KB Created: 2021-03-08 00:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b1c69edb35b4cf0fbd8cb792186a78f1 SHA-1: 80112b8cc6b1e8621a9c981c3775737c116b6938 SHA-256: 00cec5df0c1732a49ec544cd74c835290d13fd947475368eb2dd18e2c0daf26c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting potentially harmful sites.

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://xezojetit.ru/aws?utm_term=jenn+air+range+downdraft+manual PDF link annotation
    • https://cdn.sqhk.co/fopeziriga/fLicPEC/suzuni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409798/normal_5fc714f7076b8.pdfIn PDF document text
    • http://alcexpress3.xyz/955869664011l1v9.pdfIn PDF document text
    • http://avtovishki-msk.ru/savita_bhabhi_all_episode_in_hindihlxjq.pdfIn PDF document text
    • http://hookup154.space/synthesia_easy_songs_midi7w2hd.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/what_are_the_5_characteristics_of_god.pdfIn PDF document text
    • http://alcozerox.com/xixesowa1zyad.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/cidhgyf/kemokasasovajigewa.pdfIn PDF document text
    • http://lishop.site/piputolzo8n.pdfIn PDF document text
    • http://cafechorsu.ru/seroquel_medication_guideflrn8.pdfIn PDF document text
    • http://qqkaxes.xyz/85267072871c4sxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_60190e7c29e7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomutojekes.myartsonline.com/fifty_shades_of_gray_songs_download_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/25747958995.pdfIn PDF document text
    • http://kamigawox.atwebpages.com/katiratakunosilubojuxir.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/30224668727.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_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 5132 bytes
SHA-256: a76144ea9bc847b042f5af63847459ea18b4509238194ea6dfe4a5c79eb9c058
font_01_sfnt_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 11708 bytes
SHA-256: 689b488b7774f08def8a6518685929af642dba05c8cef26bcf6e40e7de5da244

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