Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e8385b5a016f22…

MALICIOUS

PDF

88.2 KB Created: 2021-09-23 12:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 26b7a4728a6378b1277eab9fb8138d3e SHA-1: 7ed2e439dda11c8bf11369de371570ecb76ed13b SHA-256: 86e8385b5a016f228828254327d19d1b999db8b5b2165e9508f254a4968dfcf3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a malicious intent to redirect users to potentially harmful sites. The presence of embedded JavaScript further supports malicious activity, likely for obfuscation or exploitation. The ClamAV detection and ML classifier strongly indicate this PDF is malicious, likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://archism.ru/uplcv?utm_term=good+rpg+games+for+android PDF link annotation
    • http://hangtatmj.com/userfiles/58950332172.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/77953224145.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/17201638483.pdfIn PDF document text
    • https://sanidom.pl/img/file/xazop.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ppbm7o13agmid291ds6a761ssk/25888166544.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/4821124133.pdfIn PDF document text
    • http://goldmustang.com/files/files/61970903210.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/84502595397.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/23389537199.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/47851321352.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/63035566730.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/12411579365.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/85317877381.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/woxaluvazi.pdfIn PDF document text
    • https://domilot.com/uploader/files/bajudid.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/bagadebejokibedumuxun.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/bizorapebejadagekefixa.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/19115583639.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/fegilo.pdfIn PDF document text
    • http://c2r.su/uploadfiles/file/2021091515583073499.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/lorepusol.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/mebida.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/49351135004.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_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 16904 bytes
SHA-256: 7f77986b0cdb8e00e160a18960e73e34fd6f9582c9acbf414d30094526f4573f
font_01_sfnt_off000122cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE6 10736 bytes
SHA-256: c3aea621856a243ef2fd130eb163976a5d8dc9774419551a678f47acf2214c4a

Open this report in the interactive analyzer, or submit your own file for analysis.