Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f884352d1d9267…

MALICIOUS

PDF

78.6 KB Created: 2021-09-12 18:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 99dd6de8372b58cacbb224768b7bf6ac SHA-1: a1c3482addca7ee9de3d9d6b1f5f67c6f2717c8a SHA-256: 70f884352d1d9267577d7607363f734bca71682967d34e77a49cda7a12cfc221
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, for being malicious and containing a payment redirection lure. The document likely attempts to trick users into clicking embedded links that lead to compromised websites, impersonating financial institutions to steal sensitive information. No scripts were extracted, but the presence of numerous embedded URLs and the specific lure pattern strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://omonetach.pl/foto/ilustracje/file/73773023304.pdf In PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/674af27524ac7f387e8e41dfef3f9e08/belujijepomoki.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/bunaboji.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/81500563933.pdfIn PDF document text
    • https://icbacademy.com/upload/files/15202136107.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/fetutu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1613284c8d567d---puxawibopinisatu.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/duvasizi.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/74447503953.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/85162883243.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/varowotodeboxetafixutuv.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/98105890454.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a19a505c3d---figefekibe.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/mapez.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/08e153b56ca89ab22f6e1a818b35999e/lazuterowekibajigixa.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/fanasululavime.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/50380162520.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/983475251.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/21675146497.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/fiwikurixozinelivaposabe.pdfIn PDF document text
    • https://ckmandarin.com/uploads/90798889570.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/fejuvonunakuxudafitisi.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/jomigupojiguxovur.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kanadof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=anz+banking+app+for+androidPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 17384 bytes
SHA-256: 78010f3dfff8949ddba17e0f6afe52b35f7b0a7972f98158118f75e5812baa03
font_01_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 10500 bytes
SHA-256: 24213290bc40e1da57d95b53137d262ed4c5d690c41925c47207e13de4eaa48d
font_02_sfnt_off00011480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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