Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e174d8f11488368…

MALICIOUS

PDF

82.2 KB Created: 2021-09-21 07:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 626b8e0dc60f7615003f9fcae0d0c5ee SHA-1: 14a65d3c29eea7462ce181fc65d133ea688c6ebf SHA-256: 3e174d8f1148836860c6e5ab8a8cc811ffa7d535875a9ad32b9efee81d5b5836
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution intent. It contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malware or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://avs-market.ru/admin/ckfinder/userfiles/files/65146146723.pdf In PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/lokoveralame.pdfIn PDF document text
    • http://pedraferro.com/files/files/99560995435.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/61821980500.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/23302023807.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/83255674933.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/77473023094.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/jilatafajoj.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210908013440758286.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109080022416729.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/dixudusoluxuzixegotuf.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141428d73014---jarobegilufadivamugewojuf.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/zevawalakibuvuzapexox.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/nafaj.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16145dc53bc587---jadukemuxoxotijej.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/49002125608.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/fogit.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/gijatuxuxukemubes.pdfIn PDF document text
    • http://malifer.hu/upload/file/mawavaw.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/37290435226.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/gutipuvotomar.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/ruvirolofukarisivutovix.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/tedatugetoridufixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=8+ball+pool+hack+vipPDF 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_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 17144 bytes
SHA-256: 8722e5cd96f0105cb8090b9edd98bd26a5b4f75ba572c3899ecd07778aebaf4e
font_02_sfnt_off000124e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E2 10276 bytes
SHA-256: 35e906ad10125d88dcdfc5c90f87bbe663d91ed6a7533b89def2fb442a587766

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