Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba972f8578433055…

MALICIOUS

PDF

87.4 KB Created: 2021-09-01 05:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 7ebb70e3927121eb9e8b17abdf2cc112 SHA-1: d34b6a1690ab814ccb92ddc273264176c4a37e13 SHA-256: ba972f8578433055a0da9274e26be578b95e111c0018bc064407f3ebaea7bac7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9a0054dc9---rupasanad.pdf In PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/vifawinakosopu.pdfIn PDF document text
    • http://krugernilssonreunion.org/clients/c/c3/c301050bdfa85653d7453904791897ac/File/najoxigep.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/tajumetijetanipi.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/96389423611.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d59f40bc429---76358614693.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/ccbf473bbdab5e079d48b6426e5b9950/gesizanejiwodude.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/77760892632.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af5685cf209---beruwemidax.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/gokiwom.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/26314786491.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/449180a17ddeca06878db13b32bd9180/xevufegejatew.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/janob.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/kekide.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac019dcc95---pilupefonosoluxisazu.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/56857888681.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/81b79b296805da11f8e61d3b4582d8f2/sopawokikiliremefiwiwigib.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/dorotosineve.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/telafubelasetebok.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094218d28bec---serodaviru.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/gcelnjcsgjh2uj6eihhqcr3r5n/67149277540.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5b9d97efef33e5e8d11445bff86d41a2/73602954225.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/31524258121.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2c3c29d225406525349622f1c3f0fff5/34101276193.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=russell+crowe+upcoming+moviePDF 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_off0000eed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED6 18184 bytes
SHA-256: 01aa26363ab6d165308956737ce5413b83c606cf3048224eab64f2ceee840e8e
font_01_sfnt_off00011e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1A 10752 bytes
SHA-256: bf19bf3aa9fe2e461e07969010132ba010d512eee8af287f29ca9176e3c9bfb6
font_02_sfnt_off000136df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1