Malicious PDF — malware analysis report

Static analysis result for SHA-256 74133a6796b104a5…

MALICIOUS

PDF

79.5 KB Created: 2021-10-05 21:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 882448355763ff8b477c38f4451ba7e1 SHA-1: e1e8fa32e142f6e90d7c029bd0d7c6c94ad8a8c0 SHA-256: 74133a6796b104a5de3f33fa368d6b2560a5969d82af63e0cd911d1ecc38a2b2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains numerous embedded URLs that point to external domains, suggesting it functions as a link farm or phishing lure. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a pattern of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://crysiq.ru/uplcv?utm_term=expressive+meaning+in+tamil PDF link annotation
    • http://divapharma.com/uploaded/file/83616843273.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/86119464046.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/bobilibimusabowotipod.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/80488177596.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/zekowiturodirazosajapuz.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/zefasipoloka.pdfIn PDF document text
    • http://tillyardci.com/userfiles/file/3291323298.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/71677956877.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/15086578596.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/jevavefutuxowupafiroz.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/51293426904.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16153d097d3e9a---31592030263.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/lexokulejubewopabamir.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/37738512465.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/615f90b20cf2c235d2b0338547dbd53e/9164713280.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/rinobikuzotovimat.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/tulimowedan.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/51121443977.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/mirof.pdfIn PDF document text
    • http://rapet.hu/files/60619207304.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/sonozutizivusomulelife.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_off0000d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 18268 bytes
SHA-256: 7f3b6af5b0a545393498759ea27c4fb69264e90cd89c83a6f54584810f9e7ba6
font_01_sfnt_off0000fff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001180c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180C 10628 bytes
SHA-256: 9b3b95a6e8c0025a967138af24cee2b6250d3fc70bbc5e5aa976f7ba546648b9

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