Malicious PDF — malware analysis report

Static analysis result for SHA-256 70392f9eb27e49ba…

MALICIOUS

PDF

80.7 KB Created: 2021-09-12 19:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 568e3fb1f56d7782b6370e700660e7d7 SHA-1: 43a935953c32e3bba81e7861ca7c6e0fc24d48cf SHA-256: 70392f9eb27e49babfbcdcf2e125a87b539d886a9739f326bce82a673700d762
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous external URLs, suggesting it is part of a phishing or redirection scheme. Notably, it includes a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a shell, a common technique for executing malicious commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://smidgel.ru/uplcv?utm_term=mirror+phone+to+desktop PDF link annotation
    • https://jin-ji.com/upload/files/7769660534.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/87511353888.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/veriguze.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/pokomosatikexab.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/genigegugired.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/dowiponizegeduvutoxek.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137fc6474d08---80100028198.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/86688285453.pdfIn PDF document text
    • https://spyboarcams.com/files/81705957771.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/bafutebuwidopavufozoji.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/94463067035.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/79144314861.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/29374588025.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/86593761004.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/31754989447.pdfIn PDF document text
    • http://iltorg.ru/upload/file/kejufowogu.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/47933180945.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/gudovuvukag.pdfIn PDF document text
    • https://davaocarrental.com/images/file/fuvujefapejejasu.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/91841749272.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/nujenisaxo.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/revoposunuwamebaga.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_off0000d936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD936 17468 bytes
SHA-256: a243da3ba32bc6e0103d7263a055d101fe73e754fea06e6407c0abe4f41124ff
font_01_sfnt_off0001063c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063C 10368 bytes
SHA-256: 6ad4b71357518d0a990f413607ba187cad85c9064468114929ff5d0691ff568e
font_02_sfnt_off00011d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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