Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf044287e299198…

MALICIOUS

PDF

79.7 KB Created: 2021-09-13 09:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 96691f6e578565aec522d71d3028766f SHA-1: ce59c9fbff53cd6ab735789ebc504be4f8974ce8 SHA-256: ebf044287e299198ae9574af9ba2467c677d91ccc6da991e8b8794607d31c802
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate the document functions as a link farm, hosting numerous URLs on compromised WordPress sites, which is a common tactic for phishing or distributing further malware. No scripts were extracted, but the presence of multiple suspicious URLs points to a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161370e70839f6---46849713617.pdf In PDF document text
    • https://at2-turbo-j3t.com/contents/files/xobiraseberopeda.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/zoputef.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/95353440218.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109042223387066.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea806a5c22---lezigonar.pdfIn PDF document text
    • https://duel.pl/userfiles/file/gukabalewufa.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/52177726527.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/jixuzu.pdfIn PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/vilaj.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/2428264560.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/nigame.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/76554629652.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/39969969609.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/pedagijutapew.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eca71c37c9---17950811534.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/76545944945.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/57137026734.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/29882567784.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202109021004296632.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/nirenilebawenurap.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/678209741.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/33888313125.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/tevunajatonomumeje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=streaming+lucifer+season+2PDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/47452609125.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_off0000d04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 10976 bytes
SHA-256: 3f54018473f2b750864bdbd4377dd3c98fa60c48e5f828c118a762426a873dc9
font_02_sfnt_off000101e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 18176 bytes
SHA-256: 9b2b4874318cef311260034f4d3047275c4d9c1b9765bd09780bda627659b8cc