Malicious PDF — malware analysis report

Static analysis result for SHA-256 2975263ab4ba373a…

MALICIOUS

PDF

89.8 KB Created: 2021-09-02 16:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 35b1fd4f96ffa82fce002a12281b2e3f SHA-1: 3dea2c5fc01106f8e5fa84dfa8959fd6fe6183bc SHA-256: 2975263ab4ba373aac345ddcbb47733a98f016dcf0e5aa7df78e7421a714f8a0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable domains. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 https://amatnieks.com/pictures/image/zatuveraxazadabekuzapije.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/abc7ee205c2a71c87794575994fa7459/weredinutipeja.pdf
    • http://suamayin.biz/userfiles/file/dametiralepob.pdf
    • http://2446665a.ru/ckfinder/userfiles/files/3343403372.pdf
    • http://cafemsoffice.com/userfiles/files/11766518238.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b974271d99f---61019708779.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160db28c5e737f---84768858937.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c76bc980b---suvawodusalu.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/11031623685.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094a08c051f0---94994913845.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9ccd1e0a3b7bf3afff8aa38806eb74c9/tororejoposuxipem.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095476d17f9e---1463420905.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/hq047nomgc5fr0pobnlcjo44cf/ramowanukow.pdf
    • https://viettincapital.vn/upload/files/86246426858.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/68a2ea0749663f09425871b3a75d305a/tutagawomezodamo.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2a250e493---guwilumizevotozedivadas.pdf
    • https://hiroyoung.com/data/files/wepeteponebemenozeb.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bd603a6a502---gasiba.pdf
    • http://jenan.com/ckfinder/userfiles/files/zonutonu.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f33989962---wetuvatigenanusopodakuzer.pdf
    • https://mimpishio2bet.com/contents//files/jekinikoduzi.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609695dc3da88---rilorovafed.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=technique+de+drainage+agricole+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_off0000f83f.bin
8da84f54286b122ebfce4a57e9640fb7baf742b1b24433d0c8c0c114b196cd8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF83F 18476 bytes
font_01_sfnt_off000128c4.bin
696b353af5fad9933623825544fd1b983565d60494db8db387c35278170906fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x128C4 10844 bytes
font_02_sfnt_off00014125.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14125 16792 bytes