Malicious PDF — malware analysis report

Static analysis result for SHA-256 676dfcf6cb43df6c…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 03:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6e2a8454869cd5b445155eca92e6cc7 SHA-1: 8b515dad0591fa2f8c50cc0ecfd8e0d707b0c2a3 SHA-256: 676dfcf6cb43df6ca71edb2e91e637db0832a2efbb6c9d12bb9a53d58c0fcf62
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://landroverbh.com/ckfinder/userfiles/files/sezuvomiwedopeb.pdf In PDF document text
    • http://www.mostenpo.jp/userfiles/files/xipeniwifomarosakud.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/97933009165.pdfIn PDF document text
    • http://oodow.cn/upload/file/210903104941763688lnj8mr8plcku.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/24c9313ec8f79dffe773b505b0c0fa7f/tiweponefeku.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/22813907889.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/woduromalujiwimujifupo.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/daremepipenijolufila.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/fagazi.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/rozidokukuroralu.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210908004559.pdfIn PDF document text
    • http://www.zdravotechnika.com/ckfinder/userfiles/files/tijelozobazajonepivejagu.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/goperer.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/74539902952.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/panumejirunulu.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613e89645b58a---28733961609.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/31904041274.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210907_014DB4A3E9FFF0F5.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/74849799537.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/67302365950.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/nupoxivunarunudutalolaj.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/sudowupobarisulaxipapi.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/89521455849.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/39586470052.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/94755702241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=present+simple+and+present+continuous+worksheets+printablePDF 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_off0000d8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D4 11196 bytes
SHA-256: f3941288e607a06ac908ace2f7a7fc271ee1efefc8da658489b5815966fb4e27
font_01_sfnt_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 16240 bytes
SHA-256: 37724269c0303c6672ca3230e88c5edf90c3f98e175cd3376fa45d9db9fc13f5
font_02_sfnt_off00011c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1