Malicious PDF — malware analysis report

Static analysis result for SHA-256 7604897e7325345e…

MALICIOUS

PDF

92.5 KB Created: 2021-07-02 03:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 028a11f6a9ecaf03891e34469a54326c SHA-1: c6b50c2ab80560a7f1d9bda5b4e35297a3a0ea34 SHA-256: 7604897e7325345e65f0f88f307c3b23734713b7466f2949e5dd6907bed8ecce
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/4il2br34fq32gr346k71suss94/pedofivogupulosowajose.pdf
    • http://agro-pasz.pl/ckfinder/userfiles/files/78769798220.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/32461b1fbccaf8cb44949392786ab829/68609860901.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b1f60e434---58966349370.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0ad8379af98ad390c3c6753f12f5a8c2/5044702957.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b92f4b05a64---mazubowotawozawazowisid.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd338e9347f---goborek.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/8cdb8e603741524b10aa4d02a6d27032/xakalefivulorarisux.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608941ca79e19---ralazafowa.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/75a9a6b7434a424b39ed873ffee24948/36611801692.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9kid2s88esrhulc01k33s2c8vk/buwijufaragejafenive.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/65dfb1c64bb26b6dd1dc19ba6aae48c2/42104509980.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0de5d1ab7---wowufukujemijuvigokobajem.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/831523dcaef9f18d3af58fcfd7ac741e/gelodirelel.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d27c54cafec---purepevek.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd4125223---56994317832.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac530c2f7b6---vodogabipulizujutiredap.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7acc65544---19262020422.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d44afaf2634---98001189294.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/f0ba769e5a90cc181e472d1e615bdaa7/xobufezugofalu.pdf
    • https://snqrsl.quebec/upload/editor/file/84499095386.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/ab2f5e2d67c8c193db9a5327c500f01c/kewokajed.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/u20va8o7pt95mg288d5i66biu6/60843511437.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/21a35e1b8dc6740226e9b557b60cd09b/40563499927.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad69ab082db---96503099025.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=erin+sellars+solicitor
    • 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_off00010a49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A49 16792 bytes
font_01_sfnt_off0001225b.bin
9a0475b939071c973a3e38b3e909c29864b625055c5c367c894385b46b598891
pdf-font-stream PDF embedded font (sfnt) at offset 0x1225B 16776 bytes
font_02_sfnt_off00014dd3.bin
54e444ab1f92ec7b403ddcdb659d747795b6720dd9e912dfa71baec9cc08ae0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD3 10204 bytes