Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bca84ec692f5d03…

MALICIOUS

PDF

94.3 KB Created: 2021-09-20 09:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 14e26a887eea99decefbb202e2471c05 SHA-1: cf1350e02200f8a66ff5805f082d8cd24303eb0a SHA-256: 6bca84ec692f5d031fbdfc0e9d53b3a0367837eb3ea58e579c69a1bf7f4e3f2a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically pointing to a site offering game hacks, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple disposable hosting links further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=garena+free+fire+mod+apk+hack+diamond PDF link annotation
    • http://alwaysshine.com/fileimage/file/502492639.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614505c92ed43---denilusipuditizalivupem.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/sojelij.pdfIn PDF document text
    • http://trovas.com/userimages/besivorugejuxiwe.pdfIn PDF document text
    • http://infosierra.es/images/editor/16673572546.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/lefizibot.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/sojef.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/bofituvogimajiloxetoni.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/vepabowozezalisurevi.pdfIn PDF document text
    • http://compsult.net/userfiles/file/mewinisefezezizepibe.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/89156387100.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/tupafidi.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/xopufodikimivone.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/zufodinukexi.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/mowukolarojapifivawe.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/xotowevomofozaniseji.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/62729316510.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/75512630128.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/33210950597.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/22943563837.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/50429833629.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/24775963296.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/17305441179.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB25 16180 bytes
SHA-256: 6715c95098aaa9f0b3e3d1e70addc6437ba9369fc5f08e34520566c381065eb2
font_02_sfnt_off000110e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E1 10704 bytes
SHA-256: 982f6b491ff48a36144b9aa94ca56dc8678c3959620c782f9cbb807e277dea64
font_03_sfnt_off00012930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12930 25976 bytes
SHA-256: 63cf36dc27ce3090f6d867a964307d7598af0bb1632611ac4f85c4267e32b87e

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