Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c12737c9192a50…

MALICIOUS

PDF

76.5 KB Created: 2021-04-08 11:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 034766418db83bb85ede8258cc314021 SHA-1: d67b1c31e6c531f12c6747bb4f93267489d90254 SHA-256: e1c12737c9192a50df7a7268a62ce35b56693b1d13a01bc56beff514b5a18094
166 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting and an advance-fee scam lure. The document body, though garbled, suggests a theme of project management, likely a pretext for the scam. The embedded URLs point to suspicious domains, suggesting the document's primary purpose is to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://dafemum.ru/strik?utm_term=distributed+agile+development+using+scrum+in+a+large+project
    • https://cdn.sqhk.co/bitowiso/gfhjY8i/insta_emoji_photo_editor_online.pdf
    • https://cdn-cms.f-static.net/uploads/4370547/normal_604ac747b19c4.pdf
    • http://pycnidwzxc.info/pioneer_sw-8mk2_reviewl55up.pdf
    • http://blablablacar.online/descargar_el_juego_de_la_viboritajhs3o.pdf
    • http://bcpzonasegur4viabcp.com/honda_hrx217k5vka_australia8wvwh.pdf
    • https://cdn-cms.f-static.net/uploads/4479707/normal_60679b9eea6d7.pdf
    • https://cdn.sqhk.co/vatopibar/4jhjcic/combine_shapes_photoshop_cs6.pdf
    • http://7lessons.site/59415675946aguf9.pdf
    • http://richmaya.site/tensiometro_manual_y_sus_partesipoon.pdf
    • http://gtomishebs.xyz/boruit_rj-3000_batteries6c44w.pdf
    • http://afracheat1.xyz/telecharger_dcouvrez_le_framework_php_laravelhvsna.pdf
    • https://static.s123-cdn-static.com/uploads/4500183/normal_6003876b683c2.pdf
    • https://cdn-cms.f-static.net/uploads/4390642/normal_602f976bc9100.pdf
    • https://cdn.sqhk.co/neliwuwo/h1gyjgi/saxijibefetiwapowijag.pdf
    • http://bestita.space/char_broil_oil_less_fryer_turkey_recipeak815.pdf
    • https://cdn-cms.f-static.net/uploads/4403960/normal_605717740fe88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/db5acc97-acbe-4a0e-9666-4ba9ef650b37/jabaximowana.pdf
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_2d5c55d02d68446d943874db70265aa0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/61b0e07a-50c9-4219-b907-75eba04cf884/menafeluniderupamotafiz.pdf
    • https://uploads.strikinglycdn.com/files/b1ac192e-8ca9-429f-90b4-718a074f9597/flashback_x4_or_triple_delay.pdf
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_d710699733a2402d87446f42edf64c81.pdf?index=true
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_d3caa90225834a3895ddf1515d00e323.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb1.bin
5641e036a18303cb2afdff3e9ba17d670113b4063b824d10f13977987e8f088e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 5668 bytes
font_01_sfnt_off0000ffef.bin
d0e3b760234d23278a8592b15b12e0d04f7bd87692c0f419efec03b65967e8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEF 10696 bytes

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