Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c109e8a652ee35…

MALICIOUS

PDF

90.6 KB Created: 2021-09-14 01:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 290f71b885db41af5bcefa22f0820463 SHA-1: 700ed2789bbd9d60c7db47450c3abae58958d250 SHA-256: c2c109e8a652ee35e78a61d0644de41baff4a52233c545403f6d0d36b75abae9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://emenu.hu/editor_up/89709229852.pdf In PDF document text
    • https://kasihpaham.com/contents/files/43584884534.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/93254091653.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/81259553992.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/faxolukikifele.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/2089459035.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/jakoxuzikonuvezuwulesit.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/vunimisofebegirepeno.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/rujowolafuvodajeluwasu.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/rimevagemese.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/76075839238.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/pixupikixulolezajezes.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0c518f9d1f96faf73f74eef0e489c117/8683465862.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/16010008956.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/31116103487.pdfIn PDF document text
    • http://csp.hu/editor_up/gigutozimorovo.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/89058501628.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/zugepigegokepulepo.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/firezisopuw.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1630528304.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b9d6caaf7---wuzuwewit.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/borukiduketejexu.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/66182260807.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/35183077165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=vice+city+game+apk+download+for+androidPDF link annotation
    • 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_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 18532 bytes
SHA-256: 5beea1578f864474c6ddda9743f52f4374679e8fe1fe24ffbbb1d69f1dc4ad4d
font_01_sfnt_off00012a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14297 11056 bytes
SHA-256: 759b3832ee0f7ab9315c96eee81d8c1b74fd1af9f862f035e179b70773384018

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