Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6d0abddb9f6304…

MALICIOUS

PDF

76.5 KB Created: 2021-03-23 17:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a3f190be8a76a50114ccdf2b27e0e8b2 SHA-1: 6ee8229d1dadc47aedbd205a640d23a426071ae5 SHA-256: eb6d0abddb9f6304e2edfe57eec915af6dc81fb27af25739c58a469deafc2f8d
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=bse+odisha+9th+class+science+book+pdf PDF link annotation
    • https://cdn.sqhk.co/zodenizekija/3NRYjxm/xbox_game_pass_app_beta_ios.pdfIn PDF document text
    • http://vilopeg.xyz/50353960310af4ix.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/ziziws7t5s.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/jhhiihj/fastlane_road_to_revenge_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/i641rm6/27641989634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448113/normal_60019f544a16c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_603398cf26c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453550/normal_6035b9fa25ac3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389085/normal_5fcaa61e45b38.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/njghjhb/siam_express_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/d0ghZji/nba_live_mobile_basketball_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_601f7ee9cb74a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_98681d2e984d4f29a9831360a069b6bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/500f4f88-8fde-48a6-8a50-c0c4e6705b12/18012171279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96113d3f-bbd2-41fe-95c8-39d8565b2bd1/77608904625.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_58cc0cc71cb549f4836e9db230b3244c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/defba509-6701-4bc4-9132-120489b83319/vonojunuvazidupudewemaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0bb6fb8-1b59-4546-8bc0-2897e9fdebeb/28264703484.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_f82508de9a6f4b0885bdba61ebfea693.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e0bfc5-b16d-4695-a658-70bd5a90a9ef/novupodirufesolafiwawire.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_off0000e3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 5556 bytes
SHA-256: 45fab271f0b2987941509351e60842a23a4dddd86fdea078f39a8b4b9bbfb980
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 1744 bytes
SHA-256: 16df40c5b4f62a8c61103703b489519309ac3c7b92c3b6b186fbf1bb16752507
font_02_sfnt_off0000ff3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3B 10788 bytes
SHA-256: 9142838c24cfea54a3bd6d8c759e31942d0ea73ae81f4caf0e741fd431deb79a