Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbedf246e784ea9c…

MALICIOUS

PDF

91.2 KB Created: 2021-07-04 14:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b1d3d14e5e695938fcc05cbf353bf40 SHA-1: ba05beb1c7b8ce20d2816ec8027b5d6c22818580 SHA-256: fbedf246e784ea9c930d455c8c6ff0dbd74138fdd53b06e59ddf12a9246332ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. The file's structure and link farm nature align with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/2711e7d0a94c2ce607e513c2cbc32413/vabakatav.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d475c71daf---mofarudug.pdf
    • https://bawwabatrizq.com/userfiles/file/54067019667.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160768b25617ee---sodejagubifuvowod.pdf
    • https://holocaustresearch.pl/nowy/photo/file/14747836722.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/gkudfab7u55mpf4imes6hdc22l/91768459100.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160981b58e3306---84982676238.pdf
    • https://haysalon.com/public_html/userfiles/file/87531295932.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/4cd45da7cd3cf59fd0ed5e8bfc49a6a4/rinupamosonizodetaf.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4b675cb976cf32104e6f9bdb887dffbc/75686499117.pdf
    • https://acronimocostanzo.com/userfiles/file/91138005529.pdf
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/daxejol.pdf
    • https://etonbio.com/newsLetters/images/file/95278905448.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/cae406a618a8f8724620124f0fa09681/gukififezik.pdf
    • http://cana.vn/uploads/userfiles/file/60243938649.pdf
    • https://daiichigroup.net/uploads/news_file/4553226062.pdf
    • http://casier-a-bouteilles.fr/file/runubopoguroxojis.pdf
    • http://houstontca.org/Content/uploads/files/87104065309.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/fu71v06feb2cqk609416l5oppg/6450660515.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/27062792358.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a340479b7---wasinelawe.pdf
    • http://riverside-plaza.com/upload/userfile/files/xokevanewajilat.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802687815c5---wasagixi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+narrator+of+the+story
    • 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_off00010081.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10081 16792 bytes
font_01_sfnt_off00011898.bin
a4eb1cc7f404526c095962037ba73c048945eb5cff303ee468303caceb9ca4f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11898 10248 bytes
font_02_sfnt_off00012fa3.bin
4e22573f13c3eb63a9af34f4e0e278fb63056ec5fabba5bdb07b92dbdd3ff4b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA3 18244 bytes