Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f399834072e35c7…

MALICIOUS

PDF

89.3 KB Created: 2021-03-19 07:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e77eafa8eedac7cbf6777cdfb815b461 SHA-1: 690101d130cd3f3134fbac4c94b76630b0a9c935 SHA-256: 1f399834072e35c78588461633ccb74a04a639528516ad0a521fe40ffa392bb7
166 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating it's a link farm and a payment redirection lure, suggesting a phishing attempt. The embedded URL 'https://bologen.ru/award?keyword=canara+bank+statement+download+pdf' is a primary indicator of this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://bologen.ru/award?keyword=canara+bank+statement+download+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5ff3350aec272.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/85626745055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_60432a32ea772.pdfIn PDF document text
    • http://kungfumalibu.com/how_do_i_turn_off_the_red_standby_light_on_my_samsung_tvpizaf.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/gubogexepube_mokob_mefak_konifeg.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/9443254976909q6o.pdfIn PDF document text
    • https://nenodomamik.weebly.com/uploads/1/3/4/0/134095987/nilofuxewaseramo.pdfIn PDF document text
    • http://nadahul.ru/zogogtfik0.pdfIn PDF document text
    • http://dusipoweg.mywebcommunity.org/health_and_physical_education_class_9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475194/normal_5fe19644ba4ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_604dc0baac836.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/how_to_flow_a_lincoln_douglas_debate.pdfIn PDF document text
    • http://gejikojaki.scienceontheweb.net/agenda_2020_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://torejejowomu.myartsonline.com/aditya_hridayam_sanskrit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa184f0c-6b65-4b60-aae0-c0a573956784/comptia_security_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ffdf61-812b-45c9-8f01-bff573736d28/foxabasu.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_d7752009907f4b129fc5e1e5d9492225.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c9f40b-17c5-43e7-8849-64164c5eced9/integrated_chinese_level_1_part_2_workbook_answer_key_lesson_16.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_6fa31e741c94469f9ebf631a41cb7a05.pdf?index=trueIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_89987d1d952045d5960d076e7a99f9b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb97264-a563-428c-92b5-f1130813a247/ronofufigudinudegumu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10661 5388 bytes
SHA-256: c46250b7fc3e743a94e62cb6e830d02cd42f34ae0c9cc03ca48a8fd99a9238f6
font_01_sfnt_off000118aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AA 11768 bytes
SHA-256: 06f0051d151134a8120eeec41c1034c4846829bf1730368272a36f3d628f6f71
font_02_sfnt_off000140f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F3 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1