Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad0088da1ec7ed7…

MALICIOUS

PDF

76.8 KB Created: 2021-09-17 00:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0bb391989849e329ccc4cbd60ec0f6c5 SHA-1: 3317ce611f2b24cf3ac9ab61dc7bce9dcf527de7 SHA-256: fad0088da1ec7ed7925f78be6813f7504cdbd9029ace0bea45e620d639f0b49f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, suggesting the document's purpose is to facilitate phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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=fruit+cutter+game PDF link annotation
    • https://anukulagrotech.com/userfiles/file/37602400128.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109031358126990.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/sixibafiwedopozux.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/sigegajil.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/79951114181.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/1504324060.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369de064d05---vofateduk.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/wonegu.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/viborumimasodujifowudona.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/121900206266.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/kizolapudonomowareduju.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/jirepijaveliwegagul.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/zalijiwesuwezuwifez.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/13808495410.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/wazopibenoteginevi.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/54742051815.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210907_8AD4881BDD145932.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/rijevetekizemafav.pdfIn PDF document text
    • http://cleversystems.ru/userfiles/file/51531938354.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/bekovux.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/tenofakowulo.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_off0000c883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC883 17860 bytes
SHA-256: 1edafd5ab040a89982c556f1e10bcbda1ec5b5e53a21d0aaa149f421207c5053
font_01_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3F 10212 bytes
SHA-256: 2c8c1d7ec2ad0734349b1048e543beb0dc248318e66dcecae83ed034c1c6cddd

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