Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdad8599e2734785…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 13:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae8adc0363e00717f8e7a4a016e2efbc SHA-1: 9f9d011b5d95e0d2d28a5eb3868dcb13955e25cb SHA-256: bdad8599e27347850ea830f5d278b8a2d7b7fa27d6e54b0d6e81a22007dff4df
226 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • 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://jumiwimov.ru/award?keyword=cash+to+cashless+economy+challenges+and+opportunities+pdf PDF link annotation
    • https://riligisivimi.weebly.com/uploads/1/3/5/9/135992895/c444d0.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/Cgchgjb/55958283549.pdfIn PDF document text
    • https://rodovijakul.weebly.com/uploads/1/3/2/7/132741348/9655810.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/egjqP7u/zig_zag_colorbond_fence.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/razefumub-bubopafigifoki-wamaxanowelere.pdfIn PDF document text
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/4f9049e3.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/eiijgeY/mobile_payment_application.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/liken_simpleks_kronik.pdfIn PDF document text
    • https://duwodalufe.weebly.com/uploads/1/3/3/9/133997525/raper.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/danefazet-rodajepuzez.pdfIn PDF document text
    • https://sadewirezetif.weebly.com/uploads/1/3/4/3/134318623/640228.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/2dhb36V/71598608877.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/tiny_homes_plans_canada.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://tuzuxutetug.atwebpages.com/lolawakibidugeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c895e2-2cba-4778-9bc1-530379103b49/can_you_share_a_story_on_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88123d35-5d48-44c9-abc2-814a36ec96f6/vinujinanumuwuvutelamab.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/great_god_of_wonders_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f25e1bd-64ba-475c-9de6-638f4eed41cd/70358978180.pdfIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_50b488175e3142f2a1eeae883a001b03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b94dab7-3e36-43a9-bb8e-3899e57810c8/16154004470.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_aa21728580aa403ca31d059b6c093fd1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/005aa463-82cc-4817-b479-827078e2f3f8/4241637583.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_off0000e5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 5576 bytes
SHA-256: 5ce8b4bcc6fc5e177778fc89d13e14a5f3bacdda9cac037157180f03e917c6cd
font_01_sfnt_off0000f89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89D 10932 bytes
SHA-256: 0c3c9b8bad7518285796a8fef4c85ea74157f54145a55033b995a5158862d1e9
font_02_sfnt_off00011de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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