Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e337adebe97a366…

MALICIOUS

PDF

81.2 KB Created: 2021-09-19 14:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57c6a094ae0d1a1faeec3a1e0140e0c9 SHA-1: 3034afe17bc76b2ef02c0a118ee1644b1443c49d SHA-256: 8e337adebe97a3663500afc1c0479e30bd13f3f823c2dbc5bef6e310fdc53a04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://archism.ru/uplcv?utm_term=the+elder+scrolls+online
    • http://studiozammuner.eu/userfiles/files/47397145710.pdf
    • http://petukmahaaaraj.com/userfiles/file/woxisovol.pdf
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61417225570.pdf
    • http://denda.co.kr/ckfinder/userfiles/files/24923095509.pdf
    • http://svezadjecu.me/userfiles/file/98573653418.pdf
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/zesamas.pdf
    • http://hotelborgodeipoeti.com/userfiles/files/davapev.pdf
    • http://studiofranzoni.eu/userfiles/files/kaduzekibuk.pdf
    • https://pisausakti.com/contents/files/10650127128.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/lvcrulpsv6v6gvqh22gpi7sps0/famemujureniwageribonita.pdf
    • https://beta.nhatthiengroup.com/files/uploaded/files/gitivejukizagijej.pdf
    • http://www.jokilaaksonratsastajat.fi/file/xexutidefadedurarupub.pdf
    • http://branonperformance.com/ckfinder/userfiles/files/pajajub.pdf
    • http://chunmianxian.com/upfolder/e/files/20210915200503.pdf
    • http://stoka-saarlouis.de/userfiles/file/68979374179.pdf
    • https://feniks9.ru/ckfinder/userfiles/files/18754877790.pdf
    • http://jgweld18.com/UploadFile/file/20210902121730810.pdf
    • https://noursportevents.com/wheelmarine/userfiles/file/96672438398.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/68ffb1332adfad4c5961071298d106bf/5421159431.pdf
    • https://rajatotogroup1.com/contents/files/pufedakerawesokuvowifezu.pdf
    • http://kalkulacka-hypo.cz/userfiles/files/navudanog.pdf
    • https://aimhc.com/userfiles/file/difozodejifufapupixe.pdf
    • https://beautyyaurient.com/editor_upload/file/dupebaligetuxaxomuvewe.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_off0000dc8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 16792 bytes
font_01_sfnt_off0000f4a0.bin
e977d0f1123115578c4fd13b8f985f7cca0a44f70c63ec73fbdd2abbb3aa1de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A0 17104 bytes
font_02_sfnt_off000120f9.bin
e4fd139582265ca8ef82b5b2313db3ad07a44fa84e388be3717935406ed4edec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120F9 10168 bytes

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