Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9e676b3444e8c1…

MALICIOUS

PDF

71.9 KB Created: 2021-09-26 11:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6322f563fc5133e49d6fa12807bfff89 SHA-1: cf22f83d7338049f74c36824d65d1f5b5c4e6fca SHA-256: eb9e676b3444e8c173ee88b3ca13b6771d88323cadcee3d7831df414a81f8998
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is structured as a link farm, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the heuristic identifying it as a link farm on disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://medvor.ru/uplcv?utm_term=nba+2k+my+career+locker+codes PDF link annotation
    • http://gatewayhotelbangkok.com/upfile_hotel/files/88545950756.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/89732687872.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/worimagefonilesegumef.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/remoduga.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/zepamawo.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/99271853487.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021091619161673499.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/raripozajizeponu.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/rawojosotijenovi.pdfIn PDF document text
    • https://ebooksweb.net/files/file/wolisinafulisojiretarofis.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/zevolesuzeluxobotigipexa.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/pezaruvaresa.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/finonevorasev.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/63390707820.pdfIn PDF document text
    • http://getem.pl/files/file/mipalosusi.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/fumugizuzeneraxojoxofivox.pdfIn PDF document text
    • http://nova-auto.com/upload/34034971914.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/14135144555.pdfIn PDF document text
    • http://slsnn.ru/content/file/tedigufusepope.pdfIn PDF document text
    • http://makaroma.fr/upload/file/jedegojevinopujorob.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/jezotuzobodakarul.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/kodinufavejidopider.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/26760271934.pdfIn PDF document text
    • 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_off0000b2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFF 10680 bytes
SHA-256: 561fdc3d2b6a303b91bcfe8dc1dac693c536eaa44391c9a1a23d34cd7153b14c
font_02_sfnt_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 17916 bytes
SHA-256: e084f526245fde86c60cfc35c3f34bee7e0ca48aab7785776a078b69ca01d5a5

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