Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec44a689c8df9a8d…

MALICIOUS

PDF

75.2 KB Created: 2021-09-16 20:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ce9cfab5d43828d87d37507c8335d611 SHA-1: 1d8505da0e2e588e6579fbdcaa63b8d3731e001f SHA-256: ec44a689c8df9a8d0c52f31fad5029f57f98992f3c98e78415558c9658303937
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be part of a link farm designed to obscure the ultimate destination. The presence of embedded URLs and the nature of the heuristics suggest the primary goal is to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/uplcv?utm_term=download+dream+league+soccer+obb PDF link annotation
    • http://sunriverps.com/data/editor/file/jasajinanuwodinusobekuvot.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210906031141741825893.pdfIn PDF document text
    • http://didula.com/img/file/99395812294.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210915225943_mdxn05.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/76807049157.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/bd5ecbc8ef4fbeaa046d88362de3fcdf/31720533179.pdfIn PDF document text
    • http://dmkert.hu/files/file/dememukevitexad.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/74304376641.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/rorinejolavemode.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/21905299870.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/44483063922.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7373d4ce0---vefuwepegiwurulebojavagot.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/tomexujevif.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/65473243249.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134f0c9e350e---21154412488.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/figake.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/juwipogejo.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/85894926501.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/92995960371.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d013d9b819d547ea603f239712e5a4d4/76195649100.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 19988 bytes
SHA-256: d193a535c6efe15576a15a84adddef1057aaee85884ac2ded3495f09a8210f54
font_02_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 10848 bytes
SHA-256: eb0e9972e31e65d3c908fc13eafd3c4577554fff18135d0f8a70f5f5bf81a096