Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d47329ae5e54f8e…

MALICIOUS

PDF

96.1 KB Created: 2021-08-16 06:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 96891eb2161685d1e7fdff1d04f97bde SHA-1: e1c7fd216091124368b758eab806efc40bd55967 SHA-256: 4d47329ae5e54f8e4f6d560e0922e3e5a0863b166f041ad700f1e1e6c7035ee8
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It exhibits characteristics of a payment redirection lure, aiming to trick users into sending funds to an attacker-controlled account. The document also contains numerous links to external sites, some hosted on compromised WordPress installations, suggesting a link farm or distribution network for malicious content. No scripts were extracted, but the presence of external links and the payment lure pattern strongly indicate a phishing or business email compromise attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://medvor.ru/uplcv?utm_term=charter+email+settings+for+mac PDF link annotation
    • http://a1-automotivegroup.com/upload/files/39755602932.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/548ff9417ebfbfd0828f3655372d7a7b/21843141263.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/19183401662.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/44737462438.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a3d485424---41094703927.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/rf3o45gac7huhk9m20c9i0m03k/xomopipumiwoza.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/084749271c7673ff7647e2c19b833e1e/72412413723.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/10544462878.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qs026s3qrsb4ipnic66gujun77/lobepixadibalabufenovo.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/rabunisanodisajumajewa.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/41466112442.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/vuzegefemilivif.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/fabikomatijin.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/89781153270.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89793365ff---wupomibidobu.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/29894467205.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/347764d83631700a74f4c680395728dc/44505660245.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb710382001---6653256434.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f60f3248c---jogorakiter.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/veguwalonufexebopegaj.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021081523072673499.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/18062597879.pdfIn PDF document text
    • http://rahwayhigh.com/clients/42761/File/21798627702.pdfIn PDF document text
    • https://arerp.kr/data/file///90131417629.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_off00011289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11289 10812 bytes
SHA-256: 29eec506edd0936858079fa68a27b0972df8222da6b1634fc8026a90174db715
font_01_sfnt_off00012b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14366 17512 bytes
SHA-256: df16c6be32a9584d40d6b9a97b0a0e5087bfb751389fed9c97a65505291e6973

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