Malicious PDF — malware analysis report

Static analysis result for SHA-256 93eebe0f94d088fb…

MALICIOUS

PDF

114.8 KB Created: 2021-06-27 23:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42c38f976467e41edc3a6bcd7ef284cc SHA-1: 197a98d5fb03ee71c821fdcf2de6d23e92587c63 SHA-256: 93eebe0f94d088fb99140917aa084bb1d557b0eb50626abb5f0277c8d9b542fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://capmar.eu/userfiles/file/lubajipu.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/fekunumosig.pdf
    • https://epiphanych.com/images/file/89218772226.pdf
    • http://parfumerieindex.nl/images/uploads/73999377613.pdf
    • https://protradingindia.net/userfiles/file/vimexolotajeg.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd37f95309f---33048495985.pdf
    • http://sevvalturizm.com/rsm/files/jisobanezobumowugaliso.pdf
    • http://instant-image.net/UserFiles/Site/File/diwokilodanefagigituxav.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160975689ed671---zibasoxibogepifaja.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fc270406c68f2f401bf7cdcafc9bb3dd/11279819535.pdf
    • http://computerdoki.hu/user/file/timexiwujunofovototoga.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160ad02c51dc92---mokefepuku.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/m8fenvesejih14vjbta55gnr9m/lovesozepupagipar.pdf
    • http://assistance.uz/images/shared/file/23140451358.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/20478716389.pdf
    • http://allycatering.com/userfiles/legavufixozisewitu.pdf
    • https://avvocatoboretti.it/file/73336161754.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/4htpftaincvcpb54lml6jl9sd2/79930268567.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8717a0s39jj6mrte8vkc8mvisp/15464045909.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160862706cb50b---66477102759.pdf
    • http://raczcsalad.hu/files/18403770362.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/67130464109.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=conceive+and+perceive
    • 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_off000160cc.bin
17bb94eb8b54919696fe9fe95242e4e99d705642b67dc9cfe37ed8e87498fc19
pdf-font-stream PDF embedded font (sfnt) at offset 0x160CC 17752 bytes
font_01_sfnt_off00018f2a.bin
8fd93ae69430eb13ac80e94a1b133e2706cb83c15f5b78361e24b07caaf5e2c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x18F2A 10292 bytes
font_02_sfnt_off0001a670.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A670 16792 bytes