Malicious PDF — malware analysis report

Static analysis result for SHA-256 e876b99a5987d2c2…

MALICIOUS

PDF

83.5 KB Created: 2021-07-05 00:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3918787832fa447031ff6cc273817cc5 SHA-1: dbb0d8724f28df32d16709d4051614198161af6f SHA-256: e876b99a5987d2c2b77111b06d447e637ec166196f729ca4c69e0e2a1f331c04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of multiple external URIs and compromised CMS upload links indicates a deliberate effort to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://allytemp.ru/uplcv?utm_term=yearly+physical+near+me
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/9c9fec864d3be794ef42841dab50df42/57043562095.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1da469d13---rifabijabapegonusogamija.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/6cojdh1laqunkabgpe4g3vh54g/xotamuwolevosovadoxaloza.pdf
    • http://innovad-ltd.com/userfiles/file/matefa.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/259ea63173a8d4fb6c3e26329318a423/kedemopelaved.pdf
    • https://yingzhaoliuart.com/upload/file/35831099266.pdf
    • http://brnc85.com/clients/878796/File/xoxunewatezefebekuvona.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/citc2bvd268ddtkik59g708dh2/podijuzumavexojuxafi.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a25982e9e99---lazupopoxatovopev.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/2208284fb7993c52c6075a72737e8a51/zinamu.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/c90104f55dd12895a7512b61d8b99268/56957250112.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a91deddaf71---sojefir.pdf
    • http://bjeclinic.com/ckfinder/userfiles/files/29002952205.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/mn2umg92dqob7596vckt2025j5/sizupedoxefelavo.pdf
    • http://udokutscher.de/gfx/userfiles/files/zalogomipegujezasimel.pdf
    • http://harasim.cz/uploaded/files/sevisiw.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/bfc84e9d5339a5379361751b3355c149/tavejevu.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801efd4fdc6---xamerijuzewaxeteropi.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/dojapisugebelujabeperubax.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fbc6860a0f5f7b89c27de47c046d3f8b/nadapudejuxitugupokemat.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/69473350599.pdf
    • 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_off0000e30d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 16792 bytes
font_01_sfnt_off0000fb1f.bin
f205aa470b69ef708ffe05cca6e906f4e1fa5f9ed7a1336efc1440390fe99a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 17588 bytes
font_02_sfnt_off000129ae.bin
0de0161eb4e707725a9d1df65151eea7cc07da1c7bccaa573d239a7569ba5641
pdf-font-stream PDF embedded font (sfnt) at offset 0x129AE 10516 bytes