Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fda1c1c5365ff0a…

MALICIOUS

PDF

85.0 KB Created: 2021-06-27 01:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3383b513bc2fa424d9e1023ff90f4db8 SHA-1: 70d0776c7243f61710520d5cd910d6534192949a SHA-256: 6fda1c1c5365ff0a6ff11c8baa568d896f83ba18c687786819c0d636969b0736
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/p6628lh76u50pg761decka6qoi/80021486943.pdf
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/48782390258.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9f6e8a32a---pupemufapawogeparopawa.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/e222f8356e79127523a09a129c6a5248/togemevubuwoxibape.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/78ec59b06d0ea95e227dc5553c17487a/28323009786.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0c0c146c---tasuxuxuvijezasekusisoru.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/ced47a7ee6e513bfe91457a91f863d8c/77266708201.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/930gtu475h8j5aur3vt6pplkdn/59576261829.pdf
    • http://jonkmp.nl/img/cms/file/37048036922.pdf
    • https://socohoteldanang.com/uploads/image/files/87925094621.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c698b8c35d8---82764672174.pdf
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/89545468904.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/19caef49588c52b2f7e05288460bc18f/suvaxevifitokede.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/68360668081.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/62507911879f8c9400003bc4ab07abb5/99879244350.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/pe16ib37obubjh2m029eheehsl/pineges.pdf
    • http://amoy-art.com/Upload/file/8487742569.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/4g400jhodbr1dlasms5ei6ahe1/jidefubunatemegefep.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df8f5a78ac---rovaruxanutigap.pdf
    • http://cansuyu.org/resimler/files/mufizituzudedi.pdf
    • http://foto-klub.dk/userfiles/file/67543078220.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/d47c7c79280d46cc199942eec755d934/4475542922.pdf
    • http://whatdwellswithin.com/file/61995903606.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608156c5101ec---totokipuvupebutamuzisem.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dc+al+fine+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6c.bin
869c810d8711ab15251ea5467230a42ebe7ca1c6596a87f2b00a916de39fa80e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 17484 bytes
font_01_sfnt_off00011822.bin
1ba43a85548e081f192091839be6757111f08dac8095bdc3dfade81a7bce168a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11822 10196 bytes
font_02_sfnt_off00012eec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEC 16792 bytes