Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c46e3dd23e4cbee…

MALICIOUS

PDF

100.9 KB Created: 2021-09-19 02:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5dae185a4e93233554c64d98306a84a SHA-1: 2b0e801fb2a2ccdeab3cdc9bf0c00aef19deae22 SHA-256: 2c46e3dd23e4cbeea68a83cc9078ea2a4ba55b1a2becd9e58ebd4a80a34f181b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to various domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=vanessa+hudgens+nude+leak+photos
    • https://senarathgroup.lk/assets/media/file/febiboxawaw.pdf
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/kotalotufevadakote.pdf
    • http://aygroupmuh.com/image/files/kedabawojesibuxe.pdf
    • http://veganogle.es/uploads/ckfinder/files/goketefalunegune.pdf
    • http://tjtvina.com/Upload/files/nenagitarigokadis.pdf
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/43232814551.pdf
    • http://rasmesafar.net/basefile/basefiles/weketuwofowes.pdf
    • https://sibois.eu/userfiles/file/14407313029.pdf
    • https://begili.com/uploads/image/files/jivisopegidosifimegasasu.pdf
    • http://griesvoegwerken.nl/UserFiles/file/novore.pdf
    • https://maychieuvinh.vn/upload/files/82862313155.pdf
    • https://netron.pt/app/webroot/media/files/45913744420.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/94208850718.pdf
    • http://guss-ex.de/uploads/fck/file/sejuvowito.pdf
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/61056153900.pdf
    • http://www.frank-diagn.hu/userfiles/files/99875854660.pdf
    • https://oazapiekna.com/zdjecia/fck/file/tedesulefibanema.pdf
    • http://chinasoftcore.com/userfiles/file///merixavizoxudew.pdf
    • http://straps.by/ckfinder/userfiles/files/somomeluvexo.pdf
    • https://zenithservicos.com/userfiles/files/wubunumi.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/36576714650.pdf
    • http://sergeisurzhin.ru/ckfinder/userfiles/files/nigedomalusir.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/3cfe2871523669330ffbc8848e522398/86173213667.pdf
    • http://www.bluewhaleline.com/image/upload/File/83942375593.pdf
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/21251620825.pdf
    • 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_off000123a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123A7 16792 bytes
font_01_sfnt_off00013bbe.bin
f05f65e313beff354c8d5acce70d39157d4d74271246135209153dea104608b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBE 10640 bytes
font_02_sfnt_off000153d6.bin
9545d5d638ce3c9ba5cc9fa634707510c425848c890542c216e4b18577fb2956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153D6 19124 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.