Malicious PDF — malware analysis report

Static analysis result for SHA-256 43293f538dc6b6d8…

MALICIOUS

PDF

80.3 KB Created: 2021-07-20 04:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1852a36de8d9805549be1665d45c8a03 SHA-1: 8095999d2c7338f8add9ae1f996573a583fa7c6b SHA-256: 43293f538dc6b6d87968d31ac36f971c6eeef5231555316f1aeef13f7b94d978
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to obscure the final destination. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is a pretext for financial redirection, a common tactic in business email compromise attacks. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to exploit vulnerabilities or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://kcobafl.org/ckfinder/userfiles/files/7159011479.pdf In PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/88224669694.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0l2v9dimv2rokf7ghplna66mu2/vurut.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/nafironuxatunanevasera.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/nj3nth9djsl51bkuslsb3qjee4/79090949999.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/42723984004.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715bc1cfaf6---66515661350.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/jewufudinunawaza.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/k5oar82icsp9ak1hpj231gktcc/tosuborex.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/277ecc30e9fadf3fe200712ee1ca47ad/43286103629.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd458a757f---napovozazipavunepaga.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/rebaduxitosiboxeru.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/95055170814.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e11c218f4972e5095fdfb78b734e7086/potovumuf.pdfIn PDF document text
    • http://temple.mo/userfiles/file/20755083300.pdfIn PDF document text
    • https://bloomeng.com/uploads/josawezaruzaro.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/fb232221d360a3cf62a657a8e09183bc/76284618282.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/61328777495.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c49fa3881---60009467309.pdfIn PDF document text
    • http://geose.ru/userfiles/file/jepawibutez.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/205ejij415f3osu4iuprkqm1s6/70682617091.pdfIn PDF document text
    • http://euroinstytut.pl/galeria/file/87784523541.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/cdgrn2jlbhma7qpjsf316c8g66/46187105992.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/89398539472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=fur+and+feathers+animal+sanctuaryPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 10812 bytes
SHA-256: 79ea8f74ec86a06f11579ddd4b40f0c0de7d7c9609a763b524f10c6b6267c1eb
font_02_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 17432 bytes
SHA-256: 2712cb09f9b653c63a54282c894539b8102324831302ac4ecdbfb003c4f9f617

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