Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7a58faf447890b…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 12:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8ed6c0540faaf69f637bbc781624386d SHA-1: 046253f363dcfaf519358def6eac90d8011f18cc SHA-256: fd7a58faf447890b010f596158b1941d6f0bbe59d00d6ad451c0b5e77a30b545
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://indyztyle.com/ckfinder/userfiles/files/93140527147.pdf In PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396e10645fa---xelatukujosuvakulotifipu.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/81865395418.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161309dc134525---86042813217.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/46136040995.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/sopironazujuliwezi.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/74503642691.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/sosedaxi.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/ziwofijarujukanekez.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/kezapefidodimiviv.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/29015299989.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/51305022157.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f808c46145---41191394051.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/45738716424.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/9420279414.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/xomajosojatosajebitoxi.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/fe319efa9240a0442a31816da48f9596/66081399614.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/xujalowaxor.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/zodixusufimudixit.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/fbca07e34b2fb97f38c8f17d1104a862/27022989398.pdfIn PDF document text
    • http://metallpress.ru/files/fafox.pdfIn PDF document text
    • https://wsbtitan.com/images/file/loxixekomerisibijam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+owl+house+season+2+episode+5+watchPDF 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_off0000dd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD74 16852 bytes
SHA-256: da2842ddf7d391d2bb6e1a3e9e1ad2614640aa57b5313f9bb7f6585b87be2eea
font_01_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001214c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214C 10912 bytes
SHA-256: 6dc6bb2b52c0a7dba958e68e3d0a2353bbad1bb69b9ec938332dbd9f8b3d9db0