Malicious PDF — malware analysis report

Static analysis result for SHA-256 feca54396fa5b52a…

MALICIOUS

PDF

88.0 KB Created: 2021-07-07 06:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3ae0a253077cf20667a3bd05e94ec11 SHA-1: bfb5311614744b693b8f592289010d174c020574 SHA-256: feca54396fa5b52ad89a53dfb8ae7c9c229c7115409039c6641523be7d196ac7
176 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. The PRC/3D content is unusual for a standard document and may be used to obscure malicious elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/q1vv9m4d4p47k3sr9a8g7gjnt4/daboduxutujer.pdf
    • http://web68s.com/upload/files/52248338150.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/aa1f80cb9aeda315b98d6db74f1c4090/sipabukitejevujo.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0453ba0b9---68039361023.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/99990894611df10b1116502281e99405/banaz.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faf1bb80bf---31663330082.pdf
    • http://champaigncursillo.com/userfiles/file/wowokokotenusujovi.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160d0bb87acbde---pusipasego.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/fa5f3af9f62c8535bf855dcb6d3cabc8/68893616627.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e0632151f---6984723221.pdf
    • http://jrpst.pl/userfiles/file/3665368640.pdf
    • https://grandplaza.bg/uploads/assets/file/3092244887.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/r7k7dvchhu63lstiemd0q6v8iv/53534705864.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608629bdc1513---97721009841.pdf
    • http://leadershipcareer.kr/fckeditor/_upload/file/9269024818.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea61e54d0f---bivobufosazep.pdf
    • https://namlongadc.com/uploads/news/files/83068904222.pdf
    • http://bajcsidavidfoto.com/_user/file/26932379171.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/6n03aqrc9dl6njdhdrqva1l9e3/rozitodujekexakevelo.pdf
    • https://pacpartner.net/images_client//imagesfile/63342869449.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/720a7170c30a17c9114bd7b088c72fe8/8675869481.pdf
    • http://candientushinko.com/images/file/59096268197.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bce2b899c7f---pukomuxinepo.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088822015c31---pebujod.pdf
    • http://duepassidalcentro.it/userfiles/files/53705258727.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bb51116fe---rusudov.pdf
    • https://fidelishospice.com/ckfinder/userfiles/files/17796992037.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=oxford+read+and+imagine+pdf+free+download
    • 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_off0000e3e2.bin
184b4adca0f9a4f7b437011b79f9d415f81b8e24b6c5eef68f6cac998b0ce745
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 29184 bytes
font_01_sfnt_off00012196.bin
ddceb4833c0b85a3f4a0cc43ae2cd5aa168890504deb4556fa8e980117906dfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x12196 10788 bytes
font_02_sfnt_off00013a39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A39 16792 bytes