Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a94568703b1865…

MALICIOUS

PDF

127.5 KB Created: 2021-07-02 11:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41c9b3585862669fecd175ecc572824c SHA-1: 7bb7ea393d51d8b374a6de41e69acc8bbf38309a SHA-256: d0a94568703b186538b562e3a6e66a0bcfc8caa4bc4bac0e5823b210f8f9f7ed
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a payment redirection lure, a common pattern in business email compromise attacks. The document body is unreadable, but the presence of numerous links to compromised WordPress upload directories suggests an attempt to host and distribute malicious files. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078d273aa4b1---wokebatuguganoluzogivat.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6b608caf5---somerafijomowore.pdf
    • https://embassyinvietnam.com/webroot/img/files/38981347461.pdf
    • http://yaeram.com/userData/board/file/95551179198.pdf
    • http://apexnepaltravel.com/userfiles/file/mifajorebedu.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/a12d0972cb29a8600f7cf9eba02629f3/55868162755.pdf
    • http://imailbox.nl/images/uploadedimages/file/dufabozatuximixobigijus.pdf
    • https://cuisinescartier.ca/upload/editor/file/sumujudutixogisibid.pdf
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/junexomowebe.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160795a1fe64f1---netixurujuvu.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/56c1c566c86a4b3f5b76e4e679e00b38/fejaxutudogimovajewe.pdf
    • http://studiogiovannone.com/userfiles/files/kimarodizavapen.pdf
    • https://mgs-on-track.com/uploads/misc/files/28260766516.pdf
    • http://toicodonlyson.com/uploads/files/teforiwinavafopuvepez.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49bfc59811---sugunozawuzimato.pdf
    • http://jedwines.com/cmsCart//upload/file/suzatufexasobezadibitaro.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/2f08fb890477527804bce199480045dd/84186566907.pdf
    • http://msslink.ru/userfiles/files/59049971891.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/3049699904.pdf
    • http://joyear.com/ckfinder/userfiles/files/30316077940.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/21853c2196c9c60074099fe24349e698/65113690969.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=will+god+accept+me+into+heaven
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000192a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x192A9 16792 bytes
font_01_sfnt_off0001aabb.bin
ace405c0818fadf3149911dfdad617002957ea0ed1aa71a0c8b38a043826bd0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AABB 16956 bytes
font_02_sfnt_off0001d66c.bin
9b95bbeb93eda34d88e2a7a2a3c30f54359b5b381ebed4e56b7ad6e41c8624ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D66C 10752 bytes