Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a07d6eae89fc80…

MALICIOUS

PDF

82.5 KB Created: 2021-09-20 17:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: deaa7ecdc82524ec6c9374e608a7dba6 SHA-1: 04b608d3da5a83c686dc8aa575100515694ac1f6 SHA-256: 62a07d6eae89fc806db5f83af8d3eef377aa972fcea4d1c75cb63910c10cffd8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1071.001 Web Protocols

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a large number of links pointing to disposable hosting, reinforcing the phishing or malware distribution intent. The ML classifier and ClamAV detection strongly support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://allytemp.ru/uplcv?utm_term=when+your+phone+storage+is+full PDF link annotation
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/bb5a6d1c2670950b87c80b897b392514/64553191465.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/tovevo.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/maripatalebogidimabud.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/62404006140.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/vakudajitisedizaf.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/9222269655.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/66064509996.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/zelusukujuzatibilametutu.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/55327282660.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/bajiberaxiwetoj.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090602215078671.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/situzitex.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/4899cb3529359fe809bba378dc89ff1f/43340865668.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/kunimasubafumodogapis.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/batimugadekadag.pdfIn PDF document text
    • https://preciseenergygroup.com/media/44360047934.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16146ab26c4074---sigelolalamedemorudadopi.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/64798525843.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/zatezulopodezoxuj.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/maderapar.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/77010866810.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/94294534452.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/nuvofuvajudikeluzepavufi.pdfIn PDF document text
    • https://karate2.cdmedia.pl/userfiles/file/2657609070.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_off0000dc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC16 18256 bytes
SHA-256: de0645cf6c9a67dce36f5fa75dd310a9ecc0f8183593bd41f1e85be155e55af0
font_01_sfnt_off00010ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA9 10844 bytes
SHA-256: b32594b51239790bcbca985340420f2e5d102b0fc7717d1e46b8876aa3ded5b1
font_02_sfnt_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1