Malicious PDF — malware analysis report

Static analysis result for SHA-256 596e029292e1f91a…

MALICIOUS

PDF

94.5 KB Created: 2021-06-27 09:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac01be31b1cdf056a388c228e840edd6 SHA-1: 5839616903b15f0777316b3ea3ea29f244701fc6 SHA-256: 596e029292e1f91a1f267509b5c524f14b7897805d9e8361a104f872b45cc566
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these link farms and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609165efb2744---rejozalifizawa.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/cdd95ffe098981bfd20903e030becd90/15629033119.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/edf2js53e0qus55odsb3m7oe42/34330342870.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46985d60cc---fawetizepukapakawir.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b2f9562e1dd1ab3bac2eaf312f24f627/95326126880.pdf
    • http://smiletoursvietnam.com/ckfinder/userfiles/files/zorevapiloterirutuzel.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa243f7b091---87687864561.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/6f18e24b50c97c7be2c1ff7a8c336df7/23078790113.pdf
    • http://cjatkinson.com/userimages/palenixepibibuki.pdf
    • http://www.annaleehuber.com/content_files/file/fuvekutenunukaxenadi.pdf
    • http://www.emailposte.com/pictures/gojagiga.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/99f78fe96b9030d7299b54999ce5ac7d/bitalasodurozuromusevo.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3fb7bffdf---kawubavemoxaselato.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5ec69356336e5199780034f32522047a/45720210073.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a764e83eb2---38674714390.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/a6fk2ni164mvapn8dq2rq7it5m/96520149393.pdf
    • https://ryokanclub.com/FileData/ckfinder/files/20210618_3C81C6C5245F6B7C.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2437163e78---86011565037.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/adeb930956d5bc91804a6360e74c6ac6/pamipo.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/f5553558c30b2f9de79cc0a667ec428c/jawetinujuder.pdf
    • http://hugslock.com/app/webroot/img/files/45422549327.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/27ccd36724749198aa993bcb564c3c4f/dejewawow.pdf
    • http://stevis.cz/files/file/felinanada.pdf
    • https://equator-maritime.com/userfiles/file/naxumisidubifulo.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/afb8f91a17e31b0c097ac1f155796713/xapozedaxugajaduv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ringing+and+crackling+in+ear
    • 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_off00011214.bin
acadde87d19ad7dcc214b974a0aa17f67711c86fda0f0eac903f1179f797c596
pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 16744 bytes
font_01_sfnt_off00013d9d.bin
9b8ca98b8e92cf7ef513e9e31c748b39a268f68b2b62f54c31b8ecd5be91ea9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9D 10296 bytes
font_02_sfnt_off000154a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x154A1 16792 bytes