Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec23a2b01377ffd…

MALICIOUS

PDF

71.2 KB Created: 2021-09-01 21:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c4568fdd6c475f99ff23dc46f2a99bbe SHA-1: 9dc8b8c23c2cb2e29964596756ea0ed20d0e371f SHA-256: 0ec23a2b01377ffd72192bea2f892b05e080507832feb821eb061473036c6333
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking embedded links, which point to various compromised CMS uploads and disposable hosting domains. The presence of numerous external URIs suggests an attempt to redirect users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 71 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/xebolowetilajirasuviru.pdf In PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1d266e73---33911547223.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/dariwetebajakekitivi.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/bcf2a38bc10425e1c954f6e0a29816cc/zogujinimovoxuwuzad.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce9370ff50---5781486612.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/17318437615.pdfIn PDF document text
    • https://davaocarrental.com/images/file/36064565182.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc4b197913---1696086865.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/727695ad8f761e13318061e151e4e82b/63010005214.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/xowuwogex.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/vefutetugebipinararujenuj.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/87650151702.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609054fe65c08---81367742310.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/21133415516.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/mekasewadobidisite.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608b38a4efeb8---20610266400.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/2343410060.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/lozadot.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078b9afa2c8f---lebuxe.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c06c129c03c9d6084e257e69a6ac33d5/sirokov.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/rimiwuxe.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793495c0e95---73595776202.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb482d1c075---20880544437.pdfIn PDF document text
    • http://bearcatbb.com/CKEdit/upload/files/vodaxi.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/40481325866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cat+hissing+at+toy+while+playingPDF 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_off0000bbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 10664 bytes
SHA-256: df9abce5184c9184c173b6925ce539257aba70875d00736b16cfca4ec1f757a7
font_02_sfnt_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 13940 bytes
SHA-256: 87c50071a48f4dd029fb2cadcce3409feeef4bcf7c6909494b72fa9677cf2721