Malicious PDF — malware analysis report

Static analysis result for SHA-256 151542cbe969a167…

MALICIOUS

PDF

69.9 KB Created: 2021-10-03 02:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: c66fb02945e08ba737e9b6c0001b60f9 SHA-1: f9e1f9757075189e5ff37b939e8ab27a55638a13 SHA-256: 151542cbe969a167c8a6d36582b7cc833a5720e3facae1dc05cab73dbf852aa8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is commonly used to redirect users to external sites for phishing or further malware delivery. The PDF also contains numerous URLs, many of which are hosted on disposable domains, suggesting a link farm or distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=aircraft+ignition+system+pdf PDF link annotation
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/3afd55adf6b959f1c3a6f8317e1da184/30955776719.pdfIn PDF document text
    • http://poorclarescork.ie/images/65555996463.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/1526029120.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/53624437342.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/kabas.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/biwiretavejuno.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/zutudolawula.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/novutalevogekinerasev.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/fasagolarupetof.pdfIn PDF document text
    • http://pactolous.hu/upload/file/43993683548.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/nurudeja.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/98e625d3522e4e9746b0307ddf10e4ac/gipop.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/farila.pdfIn PDF document text
    • http://www.petersonassoc.com/emailimages/file/70898736458.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/75720505138.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/75439455944.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/mokumalijuregabolizoma.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/90251332635.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/loxasapitomesawu.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210914145014.pdfIn PDF document text
    • https://zlato-invest.cz/upload/files/tedexevetulagesifigogeka.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/23832006696.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_off0000b0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DD 11012 bytes
SHA-256: d419b1dcb240720ec14738e670314130feb42e6dc4ca32f44d85992bf37326be
font_01_sfnt_off0000ca58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA58 15732 bytes
SHA-256: c4f63185b77cf08cce0f26e7a5fbf2862e081db3810656aa954bc0e02c6990ec
font_02_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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