Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0118ce6231d4995…

MALICIOUS

PDF

75.1 KB Created: 2021-09-20 10:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c2a17780bb90899d9be6b1ab1a912995 SHA-1: 50ae264c3ef57122a4778b6af22c929117064e3b SHA-256: d0118ce6231d499535a0a8188ae0eed5ec0b4aba6bfe7dcc056f288d3ab2cf7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm and pointing to compromised CMS uploads, indicating a malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The numerous extracted URLs, many hosted on disposable domains or compromised sites, reinforce the conclusion that the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=anwar+ka+ajab+kissa+2020 PDF link annotation
    • https://birutelorasin.com/contents/files/jefazatonu.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/bakefuroko.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1df597c9---24759643107.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/09/20210911205404.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/jexozujarodop.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/litowotav.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/18000162892.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/wosuv.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/26628384551.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/xovafovokikimetanepogo.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/6ec4de97519a6a545959d40fa494f3ea/popelafu.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/fodisime.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/vonivupaxe.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/1520772126.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c801d6d41d8c418647d375dca3f8bea7/fipixubigarabumaw.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/lekisopuwasol.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/71601494493.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/xujodoxegitalepebu.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/99863946656.pdfIn PDF document text
    • http://chieucoingason.vn/files/tilawefik.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/19007010751.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/74975424702.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/31502621304.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-3/20210903032837859175.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/tawara.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 10376 bytes
SHA-256: 17e5eab77714f621408c2f9da4676e2747e0b10d44462a98b46f46561b3af3f3
font_02_sfnt_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 17724 bytes
SHA-256: 115d3c026fa7b2a2ce46aabb59f2979898c1330d8147b34fe6c8c58057e25431

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