Malicious PDF — malware analysis report

Static analysis result for SHA-256 49314fced6f03623…

MALICIOUS

PDF

80.3 KB Created: 2021-10-16 14:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: bde4346d175a6c9ca7221cfea87aa39f SHA-1: b7cbf00ea7a74fc255ef22859caf415830ba30cb SHA-256: 49314fced6f0362347f14cb6e7dac143e0d87febb0e24ac281ca7a97fdbc850e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It also functions as a link farm, directing users to numerous other PDF files hosted on various domains, suggesting a campaign to manipulate search engine results or distribute further malicious content. The presence of embedded JavaScript indicates an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://jmyhship.com/uploadfile/files/75820223915.pdf In PDF document text
    • http://singlesync.com/userfiles/file/65582785800.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/26821350920.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/sokejururefafe.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/fimawemavidoluxewuve.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/tazemolaradekadul.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/23406180513.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/41383087028.pdfIn PDF document text
    • http://unibox.lv/files/text/46540023749.pdfIn PDF document text
    • http://globalbizkorea.com/userData/board/file/60535265925.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/xesomupita.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/solalododewuk.pdfIn PDF document text
    • http://dtjxbpzx.com/filespath/files/20210923112733.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/17788103781.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/salumaduxareduregu.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/damawafalitoba.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/gixixowira.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/71738387453.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/78930372890.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/rovojajipajova.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/81758882892.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/feredufel.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/40492356909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=how+to+reply+to+a+job+interview+offerPDF 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_off0000d65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 10712 bytes
SHA-256: 1fa067eb7d603a27a2f1e921a0fce0c29efbbcf1a34f01e8a314359e5c5725ef
font_02_sfnt_off000106e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E3 17112 bytes
SHA-256: dd7f3271acf75a8a427c51c0dd31c193ad8aba7d1226fe34b6d8f2c8cc1c930b

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