Malicious PDF — malware analysis report

Static analysis result for SHA-256 29357e021048c1b6…

MALICIOUS

PDF

85.0 KB Created: 2021-09-02 01:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 231f2beafd71045534c5b04fc04a2117 SHA-1: cd409fe7602c02108a660b07b6a7a8ee457cc1ac SHA-256: 29357e021048c1b6d768650a58ba7d4a9c93ae935fb777fecc5942de3b09341a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://irlanc.ru/uplcv?utm_term=constitutional+review+pdf PDF link annotation
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda6bcdb9c---xusefu.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/25378777848.pdfIn PDF document text
    • http://fitviewer.biz/files/file/54158456366.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/61e0351ada3a18239f08be1f278ecd7d/96229543373.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/b10pc8t62m6gqjpnl5dmmb893d/woxare.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e124cd52cfa---xupikaxuzat.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/3d8ec8ad36d5fb96b4ba44decdd18b6d/57794846130.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b20c6c0e0c---goritisibu.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/vipeduvum.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/944774650.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/6ioitopa21k0tg9vnfbdd8157o/32880814702.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/89ff24777a3d06e3256567fddc9415d7/88988369480.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/weladezurezuvuwotirupez.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608088d7c4614---25044559282.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/27398448403.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/wurupazoni.pdfIn PDF document text
    • http://ceramkgres.ru/userfiles/file/15250244597.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161118bba6efa3---5054403749.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b46bd511d---mipukulimesovonexaboto.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/wodit.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/ziseligak.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608869018bfee---48485546464.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/79581002290.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa26707e792---kupuxedumivenivazo.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b6ba6ee6b---89901857200.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_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE58 10776 bytes
SHA-256: 7c362d4c459bd7ddc07ed57a7ca4767bbd0f1b810ce93dc9df06f80a3a856f67
font_02_sfnt_off00011761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11761 17888 bytes
SHA-256: a5653130dfda6a7ee9006b1d113dc1954b98f2d4d1133b4cf92e79ed96abb6ce

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