Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fb74a0f61d9604…

MALICIOUS

PDF

84.7 KB Created: 2021-06-28 05:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c23177f7063ca8bfc97adbf2dfde902 SHA-1: fcbb9e4563d4546d951ab39b191c422d3b31e16b SHA-256: 95fb74a0f61d96041d194027c5d1d0df49a11724f4ea6fa59e91e2147bf904c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users to potentially malicious websites. ClamAV detection and ML classification strongly suggest a phishing or trojan payload delivery. No scripts were extracted, but the structure points to a malicious link farm intended to lure users to compromised CMS uploads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://catamma.ru/uplcv?utm_term=bounding+in+place
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/ligofabosebefasakoziku.pdf
    • https://raiporjai.com/piceditor/file/60413667057.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b30b8747c14---fivovelarusujomutibabo.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/e285e9566d56bbe13ac9685779ea784b/pibafe.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/qmod43t897fpnl3oeir1l6eik5/86384430575.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17728998b1---kojunav.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/d1e5c510244df7558e57612d537e3c20/vatubuvav.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/04f6c7a848e29af1e2b2d977484ee9f8/dizugukojelot.pdf
    • http://eaas-journal.org/survey/userfiles/files/sejafexuvofil.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/02e2285c7fdf9a5f279ae4469e402f2d/xepaz.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/7794e97d5c8af6308f92ddc898a3e7ba/58700390824.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/krf7fsdupo7tlmqljcousin1t3/48027449046.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/rijikelemus.pdf
    • http://charivne.info/images/file/zitipumiluxefuwit.pdf
    • http://studiobaliva.eu/userfiles/files/54369536143.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/730d826ada0174596382036b2c8c18fd/58584177175.pdf
    • http://stylekd.ru/files/teminigimidenajusabe.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8a1e595ac7a8ff4590189f8b9ed39d83/bofijogeriwosurilufilemo.pdf
    • https://amoslodge10.org/ckfinder/userfiles/files/6819039661.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/0d3ee3814b8f5026c4a35d92c9859ae1/81021125510.pdf
    • http://extintoresorigen.com/images/editor/bubajizafe.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78406de52---gurimakaxurip.pdf
    • http://domholidays.com/userfiles/file/zujidaguvabamedoboma.pdf
    • http://alemotta.com/resources/original/file/bamamivopijiravanoto.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_off0000e94f.bin
4378af3a05adc55b196f444edb2da25451b80997268a91163507cfaa22382a21
pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 17064 bytes
font_01_sfnt_off0001160f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 16792 bytes
font_02_sfnt_off00012e26.bin
04c8c6eddbed5044efc60c58c94c252c172adf5ff1293baaaef833bad92d2e0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E26 10476 bytes