Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e6ce9a84774678…

MALICIOUS

PDF

84.3 KB Created: 2021-06-29 13:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d35bba1b71eb471375a141cadb648ef5 SHA-1: 071d5175ab6c941158ad1cb5dcf0200f0cc5b720 SHA-256: 94e6ce9a84774678a048b161167738f45c7543398f9de649590d39c7d7a1b851
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm used for phishing or distributing further malware. The presence of embedded URLs and the nature of the heuristics indicate a deliberate attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba15fe35b84---bezatevemerotujav.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/193635aece16ebcfba87a88c90c547cb/pogevazezolalafurofifuraw.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c59d8496a3c---fefozufosawopowideje.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/bdnplutrfcc9m27gj6o6lc948j/xikuzevonanidu.pdf
    • http://liccuza.ro/stiri_files/file/23342874902.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf324effd5---mubopurijisi.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/e1b9856a9fcfaa4706e2883774660b21/39095336502.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/gu61qtrrhq72q4l7g0j5s8dbc0/zutifipefesoparavepuzim.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a866b8ad8c0---62316684933.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/41b7d063119584bb582c1070fa714aec/43776019782.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9d8cb755755a7f08a248f3853a2a037c/paremokazalakufisizanula.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/381afc1d7bbe132322aabaa9bac7bcd2/77215901508.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0c564157904fe61e37b645966ff5b391/90261209692.pdf
    • http://vralumni.com/clients/7/71/71e0d721b250bdad3664bf54e70089ab/File/63016680742.pdf
    • http://envigest.cz/upload/file/7083749730.pdf
    • http://zbraneklapka.cz/ckfinder/userfiles/files/48699071240.pdf
    • http://szao-spb.ru/images/news/file/80293375596.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210618050324167.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4cecc1ab5---19650376322.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e8eb0a26c24c6b788d36c71ff5d94824/zorewu.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160d836da88060---88876802099.pdf
    • http://derkwoo.com/upload/editor/files/50188211688.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/le9n9fgo6cu3ef9uv2bp6sq62r/87799349428.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/kbamfh4b2s3h06dr5c7iodfsh0/6807973456.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=reading+comprehension+stories+with+questions+and+answers
    • 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_off0000e755.bin
775db5eb731154ad877a08e948daf76f5fef4669c4b936ec7a7ec5385b8bec93
pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 16668 bytes
font_01_sfnt_off00011298.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11298 16792 bytes
font_02_sfnt_off00012aaf.bin
10db9676d156a5a67395be81a9bdad7bff00620fa1117508575cec7da2171d89
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAF 11292 bytes