Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ad6cf7c17f1bd1…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 00:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0fd5bed78b003889a6869d8b934a54c SHA-1: 03c6f465589ef10d1e356c065f2fca20a551760f SHA-256: 15ad6cf7c17f1bd17d6682d1d1b7809a0be1e82dbfc91426a531118683af5e01
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 external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary purpose appears to be directing users to external URLs for potential phishing or malware delivery.

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://inwebjor.ru/uplcv?utm_term=feedback+form+sample+pdf PDF link annotation
    • https://transport-vehicules.fr/userfiles/file/88143201937.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/kukiwufa.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/pq72omps1992v4njibp15s2265/36518055893.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c8c0b6a74415ea9b2cf8e9047f418994/41918254892.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/34484918835.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/sifod.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/68805132077.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/23557257513.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/9138296686.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/taririxodumarixogo.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff03edbc6---35646374305.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/daxejofugidaz.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/togikaforisaditozubemaj.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f26030c33---wufumajofalosaz.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/tajenemumarituduvuvinu.pdfIn PDF document text
    • https://linker.tw/files/demisasuko.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/95926448269.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991f51de5a2---7512691094.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9a627865c---15788151598.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/mapanisalonidenufutabexix.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/86fbb1c137bdbcf36409b3ab25ec2e65/18515479235.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/72053280433.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/nijisudu.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/93676903181.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 18040 bytes
SHA-256: 14ae798a1ad52bccec3f79eaf131f314d6e1f0329ce87760cbd4ecc534ce38ef
font_02_sfnt_off000127e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E2 10696 bytes
SHA-256: 29ad65200cd01fa5f8a2baaa5a58ef30124478ae1a422c33c7b01c7ab47a9a3c

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