Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dfcf4380ec1cc4…

MALICIOUS

PDF

80.7 KB Created: 2021-09-07 00:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 59695ef135b3e000486cc53c517be2f2 SHA-1: 9a0ea38948f26b8b293ef105dd881220201740a7 SHA-256: 13dfcf4380ec1cc4e2fa017c25f8ebcaa8cac48cda096bd520e2eb1ccafa2644
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several heuristics indicating it functions as a link farm, including links to compromised CMS upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://asiadomainstore.com/userfiles/file/46485014498.pdf In PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/99911185232.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/8737cac52c4af0737f9becf50e3f8d3b/71019068541.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/fokebe.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16107411c2dca4---siboruvipabuju.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/moglprkq0209tq38dkj6lpeu7d/vezabitoxisozupif.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/25639113658.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/80070414079.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/komumuwugegoguxedipu.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/44415081669.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/cjmg318h35bnetr0p2t8isg8d0/kajapotodif.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/38334506694.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/86707350123.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/nubojofudavus.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d1cf44dd4---vexedijanokuzutubo.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/23013543773.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/b6rtk49tkjgul6opviv2epvs65/52400674308.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e10ee76af01---basepaxifulopujujebanivo.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/xapesomozexilunexemunubod.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/tovifijonalezukituvojakek.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/56270170261.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/jaguwibinevus.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/96915286330.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/8956826115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=tnusrb+constable+syllabus+in+tamil+pdf+download+2019PDF link annotation
    • 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_off0000d231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD231 18480 bytes
SHA-256: c3adb200d6a26ecd7423b926c85ffa21cc874b85b6b6089642ed8da5f3f593ca
font_01_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 11644 bytes
SHA-256: 777f115eb3a0cdbc9725a8f35037961f260fd06dfe64af6a6b020cbdf2a44df2
font_02_sfnt_off00011c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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