Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d035acdd9b3f1d…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 01:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: af940d323bf33e1918b65a53762968a7 SHA-1: 780cc8dd8ca010a8fd6f7c9bf2f43311a46730d5 SHA-256: f1d035acdd9b3f1d2f9c1e1486e49279bad8b663370c4cab0a571201210f0f5a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://philabc.ru/uplcv?utm_term=cheat+engine+bloons+td+6 PDF link annotation
    • http://golfvillageonline.com/userfiles/file/zuwedazeribimejaxas.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/55113716148.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/vefemivajoxo.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210902_9E254AEB22EB091A.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/83774729856.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/23288435129.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/suziriduzetov.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/jibokewu.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/23839578575.pdfIn PDF document text
    • http://edeins.com/userfiles/file/ravinuvevukixisowafaruf.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/382fe0ff4879158ab8728ff24193cd1e/mujakitorifimid.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/59723485868.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/mukimoxokupapewifoneja.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/bofugadiforu.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/bubode.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/26738574592.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/69879355076.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/setigabu.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/fafufonodepukojipomof.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/jumuxemodesefudaperig.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/14612103476.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/85475421811.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/68423574270.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_off0000ae0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0C 15328 bytes
SHA-256: c43d467c30a3fb0c33bd0b6a8173e7609d238b260ebf0f1881ffd8b60af90cbd
font_01_sfnt_off0000d520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD520 10768 bytes
SHA-256: 0aad0af6a7a8ce8462e7e9edbb6c15d84c7f85313912c445fadcd118380eb24b
font_02_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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