Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce9f182160e20ce…

MALICIOUS

PDF

83.5 KB Created: 2021-07-23 14:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4195d0488a8bdaebe8a97253cf034f7b SHA-1: 9875f0aeb1c867b0f730bbf9a21b313ba1fcb1cb SHA-256: 1ce9f182160e20ce97c56ffb5ddd1f101f25380df341e53b163c05d892913f6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to multiple distinct hosts, many of which are hosted on compromised WordPress installations. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5f69da07---21492282217.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/q851ii8ouuq0btu0lccs6p9er3/jodasowakevu.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/78400520299.pdf
    • https://annjulieskarpmo.com/userfiles/file/biluwam.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608807cdd829a---44035627038.pdf
    • http://dui-antidote.com/images/userfiles/file/polalesugesezazipezuj.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16091889e3f6d8---dutisalezujifi.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4db63da9a---komixubofa.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/10b7e1d305d154b9f57bc6da09696fe6/27213094869.pdf
    • http://broadmoor79.com/clients/864886/File/xabutame.pdf
    • http://myredm.ru/uploads/file/48808512877.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/20ci6p3r3u0465itg98o2os3sm/36480690158.pdf
    • http://fautographie.org/images/userfiles/files/99537295523.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/24eed55e4a0fa9d824e6f63d24c56253/99648986411.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/dl1cqvej60gstakdptfj82fc8f/48766926078.pdf
    • http://jar-ted.pl/file/77087937861.pdf
    • http://alpha-th.com/userfiles/file/tuwonadeg.pdf
    • http://merrygoldholidays.com/ckfinder/userfiles/files/3377560935.pdf
    • http://icltindia.in/userfiles/file/82480537373.pdf
    • https://lochoanggia.com/upload/files/57478964732.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/45dl90d3ssem9p3ro2jugcpnu7/wupulujuvoborawi.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/236672c158655b372398155c1ab13966/13462651108.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c950da490f6---pewipatufovivinosawajib.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fd6f7b912725cd9eb122ce0ad5fe678f/pijovexemokavepituvotexed.pdf
    • https://clubsecurite.fr/webroot/upload/files/46628475763.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=bomfunk+mc+freestyler+kid+in+video
    • 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_off0000e08e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE08E 16792 bytes
font_01_sfnt_off0000f8a0.bin
989bc3c4208af9ff074b892eefd78666db2ddc620dbf46ba3332ececf414f575
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 17604 bytes
font_02_sfnt_off000125ea.bin
703486a74330c5933d08d20c59d58fb3b5973e6438764ffde8ee02c15b32f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x125EA 10900 bytes