Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2a3176663a666f…

MALICIOUS

PDF

86.1 KB Created: 2021-07-29 21:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a6b7c12aa517063d2429066c5644d701 SHA-1: 7796c3a58d077bfac9fd6cc8730a8ec706dffd63 SHA-256: bd2a3176663a666f0295ee6335e0b6c01a11ad1cc97f6a0ea46dd09e3fabbf8b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall detection indicate an attempt to lure users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ladyqueen.it/userfiles/files/doboxiredesu.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a363af0867f---46128183374.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/fuximud.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fe35cf73d1e5e2c65238bf07a518130/vitadalezefopozezer.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/38348492690.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/xoxofosuvupox.pdfIn PDF document text
    • https://diphong.com/uploads/xinuvaradebe.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c89413658e5---bikewerujefozamovewutaj.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/90cf183dde34dbe9b4b40546126f016a/54614335104.pdfIn PDF document text
    • http://mvpvo.ru/userfiles/file/40218141667.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/6570627391.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc3c49fbf---xikapamov.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/tamawiwa.pdfIn PDF document text
    • https://wagaskar.com/media/fijomepewuromoduxapuregud.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/godivukepetava.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ge4mfifuq5n1ju3n0539g6j8g5/xeketone.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/tanujamijesodekavosotoze.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/f4ec0875f34d9c84d144bd1ca7642a5c/90807275802.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c867d42ca---47979808306.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/579a35a43e2c967793ec312091eae669/gimegelegowoxoge.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/73455955024.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8efdfc1a0a---verifolitux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=trigger+finger+physical+therapy+exercises+pdfPDF 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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 16564 bytes
SHA-256: be69782d424b1c8618dac344dc51b1a20aa75b42d41e73a733df7e955ba5b15b
font_01_sfnt_off0001186f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186F 10956 bytes
SHA-256: e72a6919e9d08bb3fda711da2920c9f4935a00254ea02ce9b89b0e05d80d1686
font_02_sfnt_off00013199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13199 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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