Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3ec7af230ff4f0…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 13:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4d1d5710874f20a8582cfc99420839b7 SHA-1: 5a5a40b487e0797b391efedfac4da814635cdcab SHA-256: 2d3ec7af230ff4f0fa78cd80c6d2024ff2133c72e8c2eed83d2c8f6f0ef94bae
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous extracted URLs pointing to PDFs on various domains suggest a link farm designed to host malicious content, likely for phishing or malware distribution. The presence of a PDF_URI pointing to a URL with a 'jurassic park watch free online' utm_term further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • 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://www.verneteco.com/ckfinder/userfiles/files/57167531419.pdf In PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/togemipote.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/zufejida.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/67048017773.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386adf233a4---67361819529.pdfIn PDF document text
    • https://wsbtitan.com/images/file/48416705354.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/39248743308.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/xefadumalulazebazi.pdfIn PDF document text
    • http://reichspfarrer.sk/file/17494325694.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/50563256225.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/metidozosubedo.pdfIn PDF document text
    • https://computerzone.pk/file/lupewenixugako.pdfIn PDF document text
    • https://eetravel.net/file/25262546587.pdfIn PDF document text
    • http://gewald.ru/content/Files/nugewetiwetesedukin.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/42420042342.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/madadepaxajolotiropewin.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/28339039521.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/fizizopifewifonufe.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109051355481450.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/14105425219.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e690a293e074e05f6457effcf4b07b89/79599026688.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/87111378075.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/nifotedizufekozuvakin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=jurassic+park+watch+free+onlinePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 10844 bytes
SHA-256: eca996c9a895effb8af86621a919db2a3e8aa4997c82bde38527461adc2f061e
font_01_sfnt_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 2588 bytes
SHA-256: 4dc94dbb2648e87467f7b71575ef1506170ba0cce5649935e645cbf43761a357
font_02_sfnt_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 17792 bytes
SHA-256: 13909abc3f701e7f7d4307a19292e07a5099ba15c7529413e82a8383009e531c
font_03_sfnt_off00011cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1