Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db3cf2214a3ee7b…

MALICIOUS

PDF

73.2 KB Created: 2021-06-06 21:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 30dbcdeef07c6caf0f7413ccc811d606 SHA-1: 689512cbcbb91a8aebeabb2cbec2373df7081e2a SHA-256: 3db3cf2214a3ee7b7ad398d96578fe97a10ff6ccdef8200ad141521de94203fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'streaming gratuit' term indicates a lure for potentially pirated content, a common phishing tactic. ClamAV and ML classifiers also flagged this PDF as malicious, reinforcing the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/uplcv?utm_term=le+prince+et+moi+2+mariage+royal+streaming+gratuit PDF link annotation
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098cd2366a4b---lisosarunemis.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210601234430.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87397cf574---68597802874.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/35314087809.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/78db67f2d5c8b37a90de15f2220efed6/pakomijomesebavazefuwi.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6a7f1e1a9---gaziwofivesotitifewovixe.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/19437128964.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748884dd367---38593490626.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/deaa2651ee3539c7d7ab2d73eb707202/nafatanovolisalidoj.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a992bdc215---mojovazaf.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac1d1499f3---31670808035.pdfIn PDF document text
    • https://monocroma.it/wp-content/plugins/super-forms/uploads/php/files/f6d0aaea17c13718b01adf0f80695024/27416497135.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16082b450476ec---28404462189.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/43500515379.pdfIn PDF document text
    • https://ivaco.it/file/54385216149.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/aed1f61ca9a9334e8d5fba82ac5aedda/44128512947.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/71625280813.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/zomarijemoxorukafum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 5428 bytes
SHA-256: 20227fbecaad066fac293880f5850b422b906e741cd2a6e0767d1315cff9a85c
font_01_sfnt_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 12432 bytes
SHA-256: e9757b55d2114fc78560dd5901b2a5ffb76baec6ebde9bdb61b03e1b4195bf1c