Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed21e58369396e8…

MALICIOUS

PDF

84.4 KB Created: 2021-08-19 19:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e94f30011d9d1b20d26b0ad3ad28f6bb SHA-1: 604577bc7573698d28f4b5e013e71889ab9c1ca0 SHA-256: bed21e58369396e8ea3e41e33dee6cc9df2893810373f6aabdad134113be0be3
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam. It contains numerous links to potentially compromised websites, many of which host PDF files, suggesting a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a workflow designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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.
  • 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 http://kommunikator.nu/demo/userfiles/file///lamurewijigakuf.pdf In PDF document text
    • http://519pf.com/userfiles/files/suzibamitunuj.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/fajaridik.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607da05ea9d61---komesofekademolivovilam.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800dc032515---minamo.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/51557255770.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/paresatosuxi.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/590787497.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/4ap4n4m5qshh01un31ncggmn33/31825316249.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/4823733498.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/ramowudiwuzenoxodasezaz.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/tinunapazegodexafuxomus.pdfIn PDF document text
    • http://dzbnf.com/upload/file///92387778731.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ae797a09e9ce247431f34301693dc3ea/87201626960.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/24243042344.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/7e6eef1b86f9d209d5095600405a4aa3/79787364946.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/2e69bdca6b8c638f34bf4f283fa4b52e/98984765288.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/pozapokiniwed.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/11863765178.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/16053423593.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/020llq42iiop9mf8n7soknp7b6/disadevipapotu.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780590a5ee8---95950078091.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c91a11b15b---gosunidifisobigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ca+edd+identity+verification+documentsPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b338210aa5b727792d435bd6f239a261/67676369317.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_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 17560 bytes
SHA-256: 197dd6e8075f7cc6684c9252288b89be4ee0f08c9397eadfb15d85d0b8b2ae92
font_01_sfnt_off00010fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDA 10904 bytes
SHA-256: 11de258026e86c1a7cb76f1671dfc49c38ae4f94435c2d1d26834b353f870f8b
font_02_sfnt_off00012927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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