Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e8ca6333028fae…

MALICIOUS

PDF

87.6 KB Created: 2021-09-06 10:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cde686d8901fd7ab23f28a724a446b87 SHA-1: fd1d41065d242a153475e517c9e8f77408ca8842 SHA-256: 69e8ca6333028fae31e37cc038a537e93fc6496d07a64c0754c37f9106ff7ea3
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous disposable domains and compromised CMS uploads, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious lure.

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://dichvutheapec.com/upload/FCK/file/58870644508.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869bcb96380---vujiporozew.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/kufawago.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rde8tb9ohd3k1lv72nqedsg11k/lajaxuti.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/365fdab99cc985fcd8822122ab03f89e/logarevurifo.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/76610498948.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/titetekiri.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/bavulupilegazanivodupukum.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/nozuf.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/gozawalemed.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/97917492430.pdfIn PDF document text
    • https://coil.hk/upload/files/55871904281.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/vaduvebeturaz.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/84257101279.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4e6be6940f1dd4894b88a1943fdec843/58446977400.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160906f018f35d---26067232642.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/84016681986.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cc4659b6e2---53540748659.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/10295997086.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/46518118841.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210805133056_235jyg.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/tazefa.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/23475a61dc5a4bbb436542c0a6da95b9/70578968779.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/fd9d5c94e80ebc06181b4a5c2d12cf7a/wifesojekefabena.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c2d7248fde52c42757d4f2a1723cdb45/banarozagelejesivaguw.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/lanajetadunedibugiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=roommate+agreement+nyc+pdfPDF 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_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 10816 bytes
SHA-256: 39b9f02b046ca486b689d507470fdc3be7183f563e156012c8c98acb230d30a6
font_01_sfnt_off0001068c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9E 19212 bytes
SHA-256: 33d65a3680d0cc5821bac55cd2419676ba9cd4bcbf8f78f937a8f7ff31fe1660