Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29d580351d5937a…

MALICIOUS

PDF

72.8 KB Created: 2021-09-17 17:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c3e034e2e9850712fac4f6327b710b84 SHA-1: 5d25e4ed00919a7f1685d8a9a5d3bb17c2cb36b5 SHA-256: c29d580351d5937acd06173fdda57614f26135e57448bc9f8ad09076b1698abc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one pointing to a raw IP address, indicating a potential attempt to host malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm on disposable hosting, reinforcing the malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kprmk.pl/userfiles/file/pokuded.pdf In PDF document text
    • https://girl0229960192.com/upload/users/files/41239329689.pdfIn PDF document text
    • https://tarsiman.ee/files/file/xenig.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/60383007147.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/kituxemolifa.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c99278980a---zovogatutaxepo.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/kibape.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/wofiwigatoduxuwituseluj.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/16406102432.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/2087684586.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/rarisuninadakolukenetot.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/betedel.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/74780667695.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/figod.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/gowixapefuvigu.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/wiliwipezidubisejosez.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/90663917903.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/55444872860.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/27529806921.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/94773116415.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/43386094001.pdfPDF link annotation
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=free+torque+pro+appPDF 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_off0000bd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD552 16432 bytes
SHA-256: 305a5848702338093d00df78eaff54c647cd1e61e17c422ca5f9503d3cf863ae
font_02_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 10056 bytes
SHA-256: 787f488be5e2a3be00aa444ec40ff6143bc1e7f8e870b99251947d166c3500d2