Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d865cbe1e290325…

MALICIOUS

PDF

86.8 KB Created: 2021-07-05 08:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7db016775cd5ae1df3ef8c446e3bf3b6 SHA-1: fb0254d66192a943ddbe13fd2b330389826c5585 SHA-256: 0d865cbe1e29032548313259f59baf865ea907f3e7c30fd7442fb50118e949a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external resources. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://lifecareproduct.in/ckfinder/userfiles/files/kafemiluzerujisutubogop.pdf
    • http://otoozevran.com/resimler/files/bitofojunazerowig.pdf
    • http://animalscipublisher.com/files/upfiles/file/wujavekokete.pdf
    • http://abnicum.ru/files/file/72741444616.pdf
    • http://reguitti-engineering.it/userfiles/files/57979018684.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/4158216b20cd99b7a0cb00a4b1f4aa3c/2343988646.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/2de816e039b058555de582f60ed2e97e/motenefaxivatidirosomu.pdf
    • https://loctra.net/userfiles/file/turitepawamabe.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/84458034292.pdf
    • http://alpha-th.com/userfiles/file/41656626514.pdf
    • http://aygroupmuh.com/image/files/majepufobavusarixaxim.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/6fe645a7b66a6b2dc8a9ce2fe66878ab/5586045516.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/f972e126eb0c1970ea1db7e89bbcaef7/17445012066.pdf
    • http://apcmagon.com/userfiles/nobawutisanuk.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf04514934---pizekasago.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d47ea1bfb67---50171992316.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087882be8891---xegogire.pdf
    • https://cvsc.co/userfiles/file/rijuvogalagi.pdf
    • http://seksdagen.nl/userfiles/file/vuwika.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c67b926eb28---wawaxewarubakex.pdf
    • http://dienmaybaongoc.com/ckfinder/userfiles/files/57939524981.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091dc334129e---13091280307.pdf
    • http://klpa.net/userData/board/file/57506582378.pdf
    • https://walkandsmile.com/userfiles/file/36647561499.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=when+does+the+summer+olympics+start
    • 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_off0000ef6e.bin
9173a3ee180f8ce8f960032dfd7097c514b2de7c506c2cb01ec6dde87efdf8c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 17212 bytes
font_01_sfnt_off00011c46.bin
679a0e89158321d1bb94d8e4ffb7f7ce010c20d84f7e16507ee4dce7f505b046
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C46 10984 bytes
font_02_sfnt_off0001359d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359D 16792 bytes