Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e1e6738f38b81d…

MALICIOUS

PDF

72.1 KB Created: 2021-06-07 06:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccccb7a94925165d5b22ab76366065d7 SHA-1: 7931efd1c34401afea5ab4cb541c23b0e09eb531 SHA-256: 78e1e6738f38b81d003d86e1420375927b8388cdc1d0a6fabed0d82e0eeed749
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ClamAV and ML models, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The document's content and structure align with a phishing lure, attempting to disguise malicious links as legitimate search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8438

Heuristics 5

  • 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
  • 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=quest%25C3%25B5es+de+equilibrio+quimico+pdf
    • http://eko-inwest.eu/upload/file/31493374194.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609de1b401ad5---78608152926.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f7aeda84cd02f8389a416712bcde0d1f/22268470183.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/5505d9bb4814866b42e6a7ad4b433e9f/diguzakijuwigomurug.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/41f8d51554518e8ae6ea31b3ca7a1286/gumanolizaxeralete.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0473c5712---11076479551.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/qmkdh7mtvk7fc1vgvapsbh03gu/mepumavoresomekegit.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cff2680fc---74755421762.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802c23ea08c---gisaxupawunumaxewumifile.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3ukkh46s68vnedgsq66kde57v2/75737907644.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/f36c2966f74b7cb588edf5c3ff212c2e/maxapokuduwo.pdf
    • https://eobliecky.sk/userfiles/file/bojewugaxika.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160acc57f5ae94---ramoxomuzapo.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/69f5d58652e2dc3d6c4156a820d94e3f/2639890863.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7d1.bin
5e11209aa57b01864c8440d86cfc2c312a01175d91cade67af943bd30f78a908		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D1 4636 bytes
font_01_sfnt_off0000d7dc.bin
c51019026bb2a0b87777536ecfa87017a43a103023f5733662eaf325eddb93f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 5636 bytes
font_02_sfnt_off0000eaa9.bin
a6cc750ea3eb81fca13bae16052360ec11bc01ff85ef3e56edf451803a22dc7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 12476 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.