Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a05d0701ab6441…

MALICIOUS

PDF

83.7 KB Created: 2021-06-20 17:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c381dd6ee7b0cefa3ccc6f98faed14e2 SHA-1: 0e8ae56467caefb3ea547a48a571f19a277482c6 SHA-256: 43a05d0701ab6441b6beffe591c0b74bc585dfecd49f246f3cce3a3df32c1119
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malware. The presence of 'Clash of Clans' in a URL suggests a lure for gamers. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/uplcv?utm_term=coc+server+clash+of+clans+download PDF link annotation
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608786460d47b---moxixojuxidemav.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/lejusajokizorekonebo.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/e38de63745f1e5e633a58aba192d3a0f/zanopegenibufatuziw.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/1bacd903c72ff0743e8ac2b49daa53cc/wifomuwomamujituxoxetesop.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210507171110_741760604.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0ff8b7981---1405071004.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/40238910754.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb14d52f10a---gazokomazezixelujoxa.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160893dcef3d9f---rumozodiludagofitobogivus.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e082a57a5---rasujeledun.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/volitaxejijejumuxaxijuga.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/m3hstsn8h5212ln42qki46cjoq/derugifoju.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210530_6A5AB3D32EAC7916.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/2ca85a71805a144a750a32d46fedf79c/55646335354.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cf3ac903cc0---30848742143.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074abf990ac0---lixomunamaledozu.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb15b004ab8---55144756573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 5164 bytes
SHA-256: d2018db426e60b85c8ba6d08b8cb65aea96d78a6b3d5d417a2b10101ebdb7478
font_01_sfnt_off000111e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E0 15468 bytes
SHA-256: 80d063dbbb18b5c3da6e3073b476c3f11d3303f234e5cdcba3a1089af73de198