Malicious PDF — malware analysis report

Static analysis result for SHA-256 2555f3302a710bee…

MALICIOUS

PDF

104.2 KB Created: 2021-07-03 03:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3fe258dcfde71b4c0e5362cd4b4f8a6e SHA-1: cc8945d4b8d7e89e14973ff5df72e4584a0ce100 SHA-256: 2555f3302a710bee92dee630947270b4d37a47b819596898e051c75179660f9b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress upload directories, indicating it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the extensive use of compromised CMS uploads points to a technique for hosting malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://nomylo.ru/uplcv?utm_term=i+am+a+person+of+peace+but+if+you+want+a+piece+of+me+lyrics PDF link annotation
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b300c435c76---65237437086.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3c209d7ba127f0d3d78a30784b85818b/72921835716.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/122drujc1gkc988jd5vtdc9g58/93149526721.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607db5c80d49e---59987029952.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/baxemiroman.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/zaliruxomusuz.pdfIn PDF document text
    • http://fkhd.cz/data/img/67576704164.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/jisanevali.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c3402d983---kulifoxat.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/12278582153.pdfIn PDF document text
    • https://noddy.nu/images/file/sutodevanagomedowezula.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e7720604006f359df1a147c12490b2e8/16100939037.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/nisuwebodexefivis.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883f8375f62---repikadu.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d4cf306f---36784034.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/1cd618b4c988c545d9fc5549000a84c9/baravudibokaxib.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c50705e5993---28265760381.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdfc0427f4---gojala.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/getajiweletepuli.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a8205c1bf49---misalavajog.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/45fb2464540d7c4eb69e611e2e7d321a/46873768624.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea01a386a0---tufalokujuvurew.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kimagi.pdfIn PDF document text
    • http://soupworld.de/upload/file/megofebugujiduwumuwulava.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/43d0753db798ac34361c207ac295d04e/25108728052.pdfIn PDF document text
    • 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_off00013198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13198 17400 bytes
SHA-256: 8d88359acf0d8f57d1263fe9648935cae150708c08047a6afd0d2f8f41a0d89b
font_01_sfnt_off00015f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17751 11032 bytes
SHA-256: 07c44f1702f363fbbad713de96d6906be1d62da04dee29d09e8be8c874090520

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