Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b6e7b175c01299…

MALICIOUS

PDF

90.7 KB Created: 2021-08-06 12:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 173c90ca4d6576aad6b57b84c502b816 SHA-1: ca693590225943cdd4e6ce9f2ba9d3c8c0835301 SHA-256: 67b6e7b175c01299d6bccddb2257b12edc3e16bcde2fb9b9acb8c479fdc6e2a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded links suggest it is designed to lure users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://ankurgroups.com/userfiles/file/38552606234.pdf In PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6eb06e2cc---58372969311.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a838cfc8---kikuludoxutuza.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ch8v0arc1g32q2tegeejfpcmco/jamazagazotagexez.pdfIn PDF document text
    • https://ewt.cz/res/file/6006159633.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021061821003177.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ff3efb2442a48c0540177439f65942e1/rexek.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/sobewebiga.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/jutizemukolumino.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a085a787b8425bbcb55b92d383e749c5/10954782875.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093518c89a6c---96152793057.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095952c11cef---jovenibo.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/2ee1dff8f3ca73faf4add35e17352959/beporufuwule.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e5738d125a804c3ec38fb1a16e3067a0/nudofinarepaten.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/lazuxaxubifazevujit.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/kejuvodirinuz.pdfIn PDF document text
    • http://iviltra.lt/images/files/muzatomefosojedekoti.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//wukovawubezunovuve.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c138e29666d---fepiwenazevu.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/jesujomizatodowutigiji.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/subazuvazafipu.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ed8938ac3---jumusatosiwaluwakuj.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609034f4b9d83---20516365542.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608585b668ac3---rafur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=baby+g+tide+watch+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11538 17756 bytes
SHA-256: 2ef93b4e217efe62830afa3cd2a742eee59bcd5c3d55c61f620bf510537a872d
font_02_sfnt_off0001436e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436E 10924 bytes
SHA-256: a33792d0db4eb41a26038ad33c6bf29603e6b51380c48108828ad5a5a0c733c2

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