Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7b5ff25ca4dd9e…

MALICIOUS

PDF

87.5 KB Created: 2021-10-09 02:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 20c0f47ebe38803a2d84cb045edbe726 SHA-1: 93c57332a5ede5b2bbadd7c777adafebe7182f54 SHA-256: fd7b5ff25ca4dd9e7b31e7794280487a5f322a08b481175092180df23e8cac48
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to distribute further malware or phish for credentials. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to obscure the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://adec-interiors.net/Uploads/file/rizarepabozubig.pdf In PDF document text
    • http://philipp-haberland.de/images/upload/file/65109526053.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/174c1850c51b0c0399167762a270a23e/98832867392.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/84777504799.pdfIn PDF document text
    • https://migger.dk/userimages/file/84373391036.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/2825496590.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/8ead912419391864449069bf5b3b7936/razofubuperakamidawinu.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ef5j7l76di0rh6esl30vtgg5fb/17111757187.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/52376645547.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/30809862714.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/69008370109.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a9a65bbc35---jebolaxidu.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/xakivajasogijipenigira.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134214a9b477---62604197221.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130839a1551e---waxetorutumolovone.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/fubodasese.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/6210177120.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/12236368446.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/vixofitomerixurokerifa.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/levemuwoze.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/raronefeguzosaz.pdfIn PDF document text
    • https://marugame.hk/editor_upload/file/59596597018.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1615689f2eb901---48451163235.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/sadonixadi.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/samosir.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615624eb24633---gipaninipezatowur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=all+your+love+on+mePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 19304 bytes
SHA-256: e847ef1d57e6625aa40bc0cd09d8b423cd6573c249dbd4a398f4f4aff36dc7b6
font_02_sfnt_off00013a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A00 10012 bytes
SHA-256: 205b82f0f8286b6e204fe4688972d12beb1eb395bd34b5bec31d12b7822b6b9b