Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe62ec80ca1635f2…

MALICIOUS

PDF

69.0 KB Created: 2021-09-26 04:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8e2ae1ad0541a867beab8f0435f7dd7d SHA-1: 50ec4bc80574279f027fa8cc390ecb6545448447 SHA-256: fe62ec80ca1635f2865d65df137274191be7efc63edb5b6e0de9e46160d7f488
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to disposable domains, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of numerous external links suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://smidgel.ru/uplcv?utm_term=best+site+to+watch+free+movies PDF link annotation
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25931673138.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/18089603711.pdfIn PDF document text
    • http://kahasat.cz/data/file/nizinorugan.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/sarejodexipedukalapub.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/mosunumanexizi.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/sazifijoruxeza.pdfIn PDF document text
    • http://ptktent.ru/userfiles/file/gasimavedogerawuzifosi.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/85816545821.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/gasamujibuzejisanu.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/25000722137.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/kimuwivajavuf.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/sarewubogisinunu.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148289fc77dd---wuvekofowat.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/15320941179.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/mepawodukebulegato.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/44748461429.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/gesefevorixudopegesowawez.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8532890a7---47820192125.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/24078732604.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/48793138866.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210906160305.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/92480645999.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/tilutu.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_off0000b146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB146 14504 bytes
SHA-256: 6c3570d3262bcdc1870ee6642d7c26d094de2cefe6639c84854730f578ae305f
font_01_sfnt_off0000d57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57F 10656 bytes
SHA-256: e0a67e80b65c82d9f19b554ee938285a977b10270520c624f81a614d0e1ff750
font_02_sfnt_off0000ee17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1