Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4e1cf29fd0b87e…

MALICIOUS

PDF

114.5 KB Created: 2021-03-12 13:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4688068d92ba100e1204caf3b0fc334a SHA-1: bb2745db145fcc2ab6b13104c88479f2a314da93 SHA-256: 9e4e1cf29fd0b87ec9085aeea4524a531fd3e621084fead263dca001eb9824ce
202 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 heuristic findings point to a link farm containing numerous external PDF links, with one specific URL identified as a potential lure. The presence of a 'download button' lure and the overall structure suggest this document is designed to trick users into navigating to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/award?keyword=shatpath+brahman+granth+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425926/normal_602e21dd470de.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/fidejeQ/vologimigalitupewafolug.pdfIn PDF document text
    • http://pegajopakazo.22web.org/69584816807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403823/normal_5fefcabe4d603.pdfIn PDF document text
    • http://kemesigejafine.iblogger.org/honda_rancher_es_carburetor_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485703/normal_603f87ec2603b.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/hDhfifa/8865473187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_60137b34c4282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5fc985c43b4c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_60277fc7361ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_602224498830a.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/05Bhdii/tank_battle_simulator_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416321/normal_604793a0e79b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375339/normal_5fcecc6f05642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_6e1a40935219469b92b8bc6dd7f1bab4.pdf?index=trueIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_52d0fabce24b48e09a527f7361549c14.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_59c43ee56ccf48609e58ff54a74565b3.pdf?index=trueIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_49c0f5bd2abe4aedbb54c5042b08f9cb.pdf?index=trueIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_37f1333dc68e476a80c050ade3f33927.pdf?index=trueIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001353a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353A 5000 bytes
SHA-256: 53655ca113c0d49dc58089482e2e3cf74ff444a22bbfbf3f8a654ecdf05afc15
font_01_sfnt_off000145f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F7 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0001515a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1515A 10964 bytes
SHA-256: 6c2d6920a6fb9f1e23509d3a022ccff20b06d161fc4e9104cd30c07814302868
font_03_sfnt_off000176e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E4 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
font_04_sfnt_off00018b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B4C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_05_sfnt_off0001994d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1994D 10796 bytes
SHA-256: db80ac92d20db3564ac49d3da702758a9297c0a3c76b700ec0ae065468534541

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