Malicious PDF — malware analysis report

Static analysis result for SHA-256 6069a9ec11ec9ab0…

MALICIOUS

PDF

79.9 KB Created: 2021-09-20 00:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea50ac0b83db28b810a6861bf841332d SHA-1: 50a39fbf91e458689687bdcde61502829fd36149 SHA-256: 6069a9ec11ec9ab03d5e7b730689e292855e2e57a8d8fc83ea438bd4dc002386
196 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous links to external websites, many of which are hosted on compromised or disposable domains. 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 scams. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://queure.ru/uplcv?utm_term=play+store+getting+account+details PDF link annotation
    • http://abwcolley.com/uploads/files/bakelaguxu.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/25901190282.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/patakuramesusapis.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613472b918cab---84879004064.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f0212ccda---joxasodewis.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/91404852132.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210915190953.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/fazobu.pdfIn PDF document text
    • http://osayit.com/images/file/65902935082.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/nujozinoxofofuwutefuteb.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/0a61r530hhekd8teqbn2e0rb6s/47838198341.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1j2q1qm2g6n64ihnqrrdb1ns76/faluwugonivilokemebe.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/75118131788.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16141395b6815e---buliseve.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/bawusibovasazediwinuzak.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/pukodipanevurup.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/7183766985.pdfIn PDF document text
    • http://dgjst.com/upfile/file/zawivobupabanu.pdfIn PDF document text
    • https://webhosting4.net/media/file/45652842148.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/jabopizekemaxefalemiguli.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/pazomenogup.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021912165285259.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/24735198538.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/56783742518.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/xabejos.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/binisumojafujebi.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://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_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 10760 bytes
SHA-256: fef9c7c2108ecbb0e1ed66cfe7fd9442697e6b1a830be7f37bfbc2526953793d
font_01_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 17396 bytes
SHA-256: 383b871c893940bb03f3127efd16f3838ede3bcc6afe681f5c4b8383f8e2f9b2
font_02_sfnt_off000119c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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