Malicious PDF — malware analysis report

Static analysis result for SHA-256 facce298782d1ac7…

MALICIOUS

PDF

84.4 KB Created: 2021-07-25 14:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 39254fb58661085df4ffcac3057f21b3 SHA-1: 8ed09fdc0fa91864d8ccee6843a25891078c4819 SHA-256: facce298782d1ac7e0b58535c04ad4206d387f3ef873631bed2cdd99f2af6d7d
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 a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://apsco.ly/userfiles/files/jamik.pdf In PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/8c5df9bc07fabd38f92616fb3e17395d/warupisutupagojefasis.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073e83a25527---keninomofijipamadorugi.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1607f817a3e536---zavinafop.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/47459488508.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/d4f6d4aa77f23f1ff4e9fff430299f26/75332536265.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/baxelepuravirako.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/fidatekolerimixosiloxok.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/67242786122.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1d1672f11---lumegiluwupifa.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/565e10c6f2f047383822f9951bd0fce4/wasujowavadakebamajisas.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/2c02700c914082b39ff79d196ec9f162/47309728769.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b06fed01794---45526134534.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3dee88b29---jedetedobuludobetedabuf.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/kinolebitaliwubozur.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608761749c3de---sijifatexafumojamonipiba.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210706033558.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098398e9ada3---44502016682.pdfIn PDF document text
    • http://iccarrentals.com/files/file/sikovovaluxanalojobemason.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/69426153565.pdfIn PDF document text
    • http://print-resource.co.uk/ckfinder/userfiles/files/32512831017.pdfIn PDF document text
    • https://vestol.bg/files/file/65686047885.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/tikivanamikek.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/88072c8b79daeeb7d3e492764a2eecd5/52618473777.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ef468d1aedd8425dddc91aa216c45eae/54933776865.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/jubosexetif.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/33318437622.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=easy+praise+and+worship+sheet+music+for+pianoPDF 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_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 11124 bytes
SHA-256: cff91a3238eade6ea514d21162e7803cbbd366aa20954feedab89bc74c3cfab1
font_02_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 17520 bytes
SHA-256: 53abc4d9fabe593796a4a0e2584b78e1a7401a50c67e537b5b294db511f9b0ad