Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dff1eab20c2a779…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 07:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 115c8d9f691708a367b3537c98944185 SHA-1: ca45343aa4127377343f987b0fe1a768b9c14831 SHA-256: 0dff1eab20c2a77980bc1a16ff0639a10462dbbc49f55dadb8f956bdc8a32886
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of link farms on disposable hosting, suggesting an attempt to redirect users to malicious sites. The 'SE_INVOICE_LURE' heuristic indicates a common social engineering tactic used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://drafthe.ru/uplcv?utm_term=scam+1992+web+series+watch+online PDF link annotation
    • http://planet-for-events.de/userfiles/file/dodivojusupa.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/40805725141.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/rotewudalaritomuko.pdfIn PDF document text
    • https://www.patisserie-flechais.fr/ckfinder/userfiles/files/kejileposa.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/81984636683.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/76812493647.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/gekixinugevatozefor.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/8731420760.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd5438dcec---61683539262.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/xegibiporakavufowijotadu.pdfIn PDF document text
    • http://yuli-china.ru/d/files/laguduxateraluwexolojaje.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/pagixozuvuvef.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/mixuxab.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/mujunulonofifuvefiled.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/vekigenidiwulokimafag.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/17815848367.pdfIn PDF document text
    • http://profstil.az/userfiles/file/losujupinaximi.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133496e29d60---36403878091.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/77698945482.pdfIn PDF document text
    • https://kalimati.in/userfiles/file/vidafor.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/ketamelafuwul.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/buzopetobakabonisabi.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_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 11136 bytes
SHA-256: 5e9803036a08651022b4f3f34df3650219c22348f4c3440b2844b2d5b1d53741
font_01_sfnt_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 18340 bytes
SHA-256: 1b6ff828e5903509f2b53751953f02ee96088b47cdb04caac722f943646942e2

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