Malicious PDF — malware analysis report

Static analysis result for SHA-256 69538705ced72373…

MALICIOUS

PDF

85.7 KB Created: 2021-09-12 10:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7ae6ef7d2ec4d186421b8c8cd090596e SHA-1: d673522be2c38d1552d5d41872fc759ef59aeefc SHA-256: 69538705ced7237361d624e98274187a3f44bd30853e464d49a03ff5bb5c9d75
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the numerous unknown URLs suggest a phishing or spam campaign aiming to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://dsagco.com/Upload/file/kovazetaxem.pdf In PDF document text
    • http://geyikkimya.com/userfiles/upload/file/74900061317.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/38542068414.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/rovubigekemipodesosifefip.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/nevipajidej.pdfIn PDF document text
    • https://petikdaun.com/contents/files/64675220502.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/dipasudigik.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/xubanimorule.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/84586908609.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/lofun.pdfIn PDF document text
    • https://europartner2.pl/uploads/juwafuzilojiturejolesa.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/betabare.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/biwatodiv.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/zuwuwuvibot.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/35161426421.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/26875627196.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/61431123141.pdfIn PDF document text
    • https://harom.ro/files/file/70258071646.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/nozatokib.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/gumivisadawiberujuja.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/suvawuv.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/vewebenodus.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/jaguwunaxeribatevuvekare.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/nexemu.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/tikupatikimezaboziwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=major+arc+formulaPDF 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_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 10128 bytes
SHA-256: 327f0d1f917184ddb875abfcce03be19faaa63ef13eac348bf73b1cc962ca5dd
font_01_sfnt_off0001030d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030D 17904 bytes
SHA-256: a9efdae1c8a071697c53b19809779d03314220a1cc2d3814ccca36cda748def7
font_02_sfnt_off0001314a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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