Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeab0e33ce7d525…

MALICIOUS

PDF

88.7 KB Created: 2021-07-07 12:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 50537fd5e55620ce99efcfa1dfa94f24 SHA-1: 88403ede3ed0c8b76fe66b248a71afcb264583f8 SHA-256: abeab0e33ce7d5257a8b04732cf4c731862b8f7b6408f00facbf6c858006aa77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6532744e3c---bivaxefodonosuwanud.pdf In PDF document text
    • http://narnivet.com/userfiles/files/24564136932.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/f1b1809e7f41195df1336bbb9b1e1c2a/49367385969.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/e8c16bbdae217b1112fa9fc72072af17/mavogojimusoriwi.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/5262479ca50a1f11d0418b2dd02086b0/45177497459.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/103c0f9e13459c1acc1698f6ffec3bb0/25857928658.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c305ddaebf8---22934988389.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/zulufevirojin.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b322b2e9799---sulawuletiwomuti.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd08513ed8---xumudij.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5d5c45d05---66251956889.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/66857065965.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/g2chh2q8r4ns1c23ql0dd4umb6/fovegugajupokivugekizet.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d4057540656---kezolagozonabut.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/55385391499.pdfIn PDF document text
    • http://fitviewer.biz/files/file/80134393433.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/754f3154f03523b379464a9ed896ab83/30646331094.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83e8335ca---89470805051.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/02d21d461a8fec5e9116e3f9e0812fe8/xonikikusemas.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/sadaperufazijoxoxin.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/togunawekono.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608a96f75d307---lotivogepudilixakufizezav.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2033a7a5a---86076482975.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f7bf7f2ef---77581464742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cafe+racer+android+1PDF 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_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001102e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102E 17576 bytes
SHA-256: a91c39fc7c9ef0ecbb6b23e1229df67b98734927eb4bd0f82b9068918bbc3dac
font_02_sfnt_off00013e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E91 10240 bytes
SHA-256: 0c3c9ae7c8ea353f121df5ecd7c4c869712d973c9bf9ac5a1f5c6f39c1bcc626