Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f6c680b93427d7…

MALICIOUS

PDF

90.3 KB Created: 2021-07-23 04:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6f63703b7dd10e67e530f7dc0e9c9482 SHA-1: cdf67e75938e2e8eeb132cc87aae0d34e277f298 SHA-256: c7f6c680b93427d7ff2b705bf55487be8b7cd3e5afd2847da54b28634d02d54d
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lead users to malicious content or phishing pages. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b594c74352---95678259340.pdf In PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092f1f8e5e23---1252122383.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/63e852129e310e2fa0e3e2d4df76041b/woroxubivu.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/50896091415.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/12351999764.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/40295b99e37a541709624ea4e94ba68a/gazuzuriputugoromodebak.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/6633a7a08c26fc2da591a96e2958ed93/52455065091.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/43568323744.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/ad6cb91ca1f0bdc91e89b19323a5c964/53145808218.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/d3c29f6c325e2b9214f8c852ebafd3e1/44052801208.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5de9aff303aba63897e7f3f2a0ce1804/wewabudavuvazojizojifo.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/52f9a18e8fe96e03be9a0290cf8adc0a/lisesad.pdfIn PDF document text
    • http://recrute.fr/files/files/34820126821.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/81177c2807767547a8b772a77142582a/91230572380.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/be1d17cb153d5097adf5c0c9ef229372/meket.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/709c3df841dae33525de236f64d696cc/75714017338.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/m7c90411rgmpnh0rlvuqqdev34/satezade.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/gjnq934qtj8mgnv3o9qqh712bf/28150735320.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/dujugitagaravaratun.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/2jru9lngct0utqhq5ieemjthca/degogumozapesagisadigo.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/24543365384.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/83d5b76d9bfc74b2d799273deb985753/82005323717.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/xagagarorikosu.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/gazobuno.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/07ad3f957dc182f2ed3e9dd3cc9fed52/xejutonalotimapulotisiwu.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/loxowotaxuzebi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=two+step+line+dance+countryPDF 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_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 16988 bytes
SHA-256: fa7474562148cc62dd507fa14350ac85532cd7e1ac56dacffe8004276605622a
font_01_sfnt_off0001291d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291D 10772 bytes
SHA-256: 3a46a656d098d4e45f933ac0ce35c780c31c55b985e4a0f1360c195d6dca21d1
font_02_sfnt_off00014224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14224 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1