Malicious PDF — malware analysis report

Static analysis result for SHA-256 710296200a259da7…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 23:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dcb4ad1b32eba245a3c044beeff8a796 SHA-1: 0df862da1c2f3d0cf1a954af93b32d8f98fd5299 SHA-256: 710296200a259da7d92f37b3cbf2fc08ef28ac9b6b9ac0e4f692854b6a7a8d40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=50+over+cricket+power+play+rules
    • http://geometrabottero.it/userfiles/files/32866801052.pdf
    • http://iphysiology.ru/upload/kekide.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141246314c6c---61920843039.pdf
    • http://starroadchina.com/userfiles/file/79652871007.pdf
    • http://fabiocaronearchitetto.com/userfiles/files/zidazokuranubakulipufive.pdf
    • https://chrmglobal.com/userfiles/file/59858922795.pdf
    • http://an-professional.ru/img/files/file/texuviranekavifupiba.pdf
    • http://chrisdepanneservices.fr/Sites/cds/files/39642471892.pdf
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/5050467077.pdf
    • http://kenshopvn.com/uploads/files/zetitig.pdf
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/fusifudokutabuvobevuzesor.pdf
    • http://mobilenmr.com/files/files/xosegexuxagaxilerudediz.pdf
    • https://jotekonybakterium.hu/userfiles/files/sonosaxitikitirosudi.pdf
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/35790781236.pdf
    • http://camel-republic.com/media/userfiles/files/80862886872.pdf
    • http://splogservice.ru/content/files/zigimuzevur.pdf
    • https://harom.ro/files/file/92210516414.pdf
    • http://fusiongrup.ro/userfiles/file/41877122064.pdf
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/loruxadubigijuwi.pdf
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/katozetizafo.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/32006428726.pdf
    • http://tnslib.tools/userfiles/files/lurebusalunadibeze.pdf
    • http://sushikyototogo.com/uploads/files/pomudok.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/e6fb7c68a4d30489d7a4e45b42e81c4b/35303208818.pdf
    • https://tannhatviet.vn/upload/files/wafuxesaninewene.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_off0000ddba.bin
be50333edd2e26577d1e882a3647844e80a99fc875af6c2b9884555384bbc323		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 17364 bytes
font_01_sfnt_off00010a51.bin
58e8d11695edada8fe7f7d1a3332b08540b18c50b2e4bfc674042cd155e4db95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A51 10880 bytes
font_02_sfnt_off000123b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123B8 16792 bytes

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