Malicious PDF — malware analysis report

Static analysis result for SHA-256 96da158127a02673…

MALICIOUS

PDF

81.4 KB Created: 2021-09-11 03:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e90a6339e76e5ad3b6b43b19ec20079 SHA-1: c7c407568e576a99dc908ae11228225d4c6a795a SHA-256: 96da158127a026735007bd3bf8edc4b9121109953c638c24f12d8bda5afea418
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution, using lures like 'one piece dubbed free'. The primary attack pattern involves tricking users into clicking malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=one+piece+dubbed+free
    • https://nguyenthelong.net/userfiles/files/44265249798.pdf
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/tewufuwimomogajafowu.pdf
    • http://iraneto.com/basefile/iranetocom/files/jizanosamenesebugidajemis.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613338ea5f8ac---vurunabimub.pdf
    • http://xn--h49al71atridzo.com/userData/board/file/28908825545.pdf
    • http://hondasushi.com/uploads/files/tunuvela.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/b1588d030d26c3d3ec1e9f0644c90604/11452319650.pdf
    • http://fotocaroli.it/userfiles/files/viloditol.pdf
    • https://chorland-dining.com/webroot/editor-uploads/files/kuvofu.pdf
    • http://decaiyun.com/upload/file/21090402520399595429s6dnnak22i.pdf
    • http://dagmare.de/userfiles/file/numelojisad.pdf
    • http://thaide.org/userfiles/file/rodabakaxudopabipesadu.pdf
    • http://www.yemany.com/yemfiles/files/12030231707.pdf
    • http://dpsnowodworze.pl/userfiles/file/nupevet.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/95016243af27a83152f3960400c844e7/rerefudegowumefiro.pdf
    • http://toroisg.com/public/images/files/datuzevomudop.pdf
    • http://hieuchuan.com/upload/files/40399939748.pdf
    • http://ansonseatery.com/uploads/files/rapobujimujus.pdf
    • http://bonezi.morefriendship.com/upload/files/ruruwoxekaginoguso.pdf
    • https://mallorcaboom.com/res/wysiwyg/file/99614378478.pdf
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/guwarerusosazafolujakut.pdf
    • https://charming-dc.com/uploads/files/202109101949107430.pdf
    • http://le-nora.com/userfiles/file/47939937286.pdf
    • http://forma8.kz/ckfinder/userfiles/files/78831910919.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b6.bin
8ba851b1247502ab4fd3b971fe6ca18630af8eb6269e2bdd0713c1607863de2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 10284 bytes
font_01_sfnt_off0000eeb7.bin
dd8dc8e59f54026de8d623fcb1b3748a2c5b8673a6d627d77d5296d61fd6335b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 18672 bytes
font_02_sfnt_off00011fdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDB 16792 bytes