Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31846bf95568f91…

MALICIOUS

PDF

84.9 KB Created: 2021-03-08 19:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e47ee26ae9579c0df2a720c9960c1722 SHA-1: 5e7668106e2fec49f1de65a9b75c8a2d5687910d SHA-256: f31846bf95568f910efa8d74362b3bec34744fe3fcddc4e57c8bc9f9e28d9bfd
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It employs a payment redirection lure, suggesting it aims to trick users into providing sensitive financial information or downloading further malware. The embedded URLs likely lead to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://vilenefex.ru/123?utm_term=gst+tax+invoice+format+in+excel+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5fe4e385845fc.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/iaij0hh/has_season_4_of_yellowstone_start.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_60465c6dc6b93.pdfIn PDF document text
    • http://tapadobav.iblogger.org/general_manager_job_description_for_resume.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/cjhUsHM/93589650199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_60230540849ff.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/vjhifgf/playstation_5_pulse_3d_wireless_headset_amazon.pdfIn PDF document text
    • http://tizakeguwowil.22web.org/dojujabokerolifo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5fcf0bc383a9e.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
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_aeb0d6c880a04c3884cc6ac45958d4f8.pdf?index=trueIn PDF document text
    • http://vepufuxizuzule.epizy.com/dia_1_de_maio__feriado_na_suia.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_da09a212adc64494912a8fadf8ad09bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/all_types_of_formal_letters_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/vimadilot.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/30546221678.pdfIn PDF document text
    • http://filoroxesofe.rf.gd/harry_potter_first_movie_cast.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_7f430dc5c3ea4a6995e66c09da753178.pdf?index=trueIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_c5f82f1b1b794c3cb4f9e10f17927375.pdf?index=trueIn PDF document text
    • http://jelugubafegoj.rf.gd/17047359340.pdfIn PDF document text
    • http://pepawelifebin.rf.gd/vavemipuwexoniwawaxik.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_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 5108 bytes
SHA-256: 7d93e9b24b756a605033c5c585cbe70ada24774fbd8bb1b6e75d54f7dabd226c
font_01_sfnt_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 11236 bytes
SHA-256: a4a2c9842d1f91f387c3e24bf36d4c5caa23a0b8a03cb7cf411aa4329ae342b5
font_02_sfnt_off0001381a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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