Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d084ee23985584…

MALICIOUS

PDF

74.6 KB Created: 2021-07-01 21:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: cdd3b549f39145a8377f37449542af44 SHA-1: 93d0b4a09b62d45933c9c3656b390c4d3812ac03 SHA-256: a9d084ee2398558412684a53afd3244d61016970f91f73924bfe22a2666a0566
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://almoheetmanpower.com/public_html/userfiles/file/81669843740.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f058b3d5b4---zitadomitilirewixudam.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/67ca93943e102f063b51f0b9e8901a31/lojoko.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/28589cfqu81a8q4mjapj4njo1a/tixeniluwiv.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/smtp53rdskj7d8ikng3du5j125/91714743760.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/junarefiwajumevetesuza.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/5edd754567b6089202a296e9237b5c54/fokenanutirirumapitijubo.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/149e7e3e44a5144540c4a34a8901f922/kodetonarodafi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d77227aa5---93772041850.pdfIn PDF document text
    • http://fruitvita.com/files/files/16982762759.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/71065278041.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748d6da9079---49874008683.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/29895667276.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/61398560808.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/08969a80c7f9bd65093197f8707c42cd/xedawiniwupazi.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160816d0cdd359---mujopawagilonawu.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/wawowawesemomivojomaz.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/lenoluluxigedaku.pdfIn PDF document text
    • http://derma-dts.de/files/file/wovodoxenemavojofatidoli.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/62525098271.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607c51295b04e---zijexekerovuxozi.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621134613.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab881a5929---52880293578.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/2ecde899ab8026dfc2384b3556e79ff5/30456759035.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/pimigovor.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d893be99032---35189986587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=crosspoint+church+servicesPDF link annotation
    • 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_off0000c0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AD 16652 bytes
SHA-256: 6f5c0c6203ab5cd94185ced64c84021e10f9540c35847e8ba0ed0156c7737d87
font_01_sfnt_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 10460 bytes
SHA-256: b8fce4669fccad94776f5d43e605e58ed1b1be58d7fd810fc3bcf44bb771527d