Malicious PDF — malware analysis report

Static analysis result for SHA-256 59660156f8bab4ba…

MALICIOUS

PDF

89.7 KB Created: 2021-09-20 21:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 20b1b672dfb6e330480c875f2a5791ae SHA-1: 153791072a91780ed2c98c5a3e66396bc2229ea6 SHA-256: 59660156f8bab4ba97c1d98d2545f7033bb6c6ed2d252cafe0c76f96687f86d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oncallanatomist.org/ckfinder/userfiles/files/tavonexuguwa.pdf In PDF document text
    • http://land89.com/ckupload/files/55848430365.pdfIn PDF document text
    • http://canadanur.com/resimler/files/30768670746.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/67161406974.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/12900286317.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/kurakozunulevipe.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/67354343498.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/18397748468.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/85533153799.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/07/95340163541.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/siwujiwoduge.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161382a144cb8f---20890942320.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/20220169269.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/papoforepewuwidizakil.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/64920645148.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/lorojujazubugawekenibe.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/8718747985.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/jorexonopuxobusalejujanu.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/94c64c5e70bd34ddc6c133f331718155/35820288799.pdfIn PDF document text
    • http://japhina.com/upload/file/lajumavubofutuzifefotuwoz.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/jutiwu.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/lebevizetujufaz.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/tanifamemexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+lion+king+2019+123moviesPDF 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_off0000f73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 18720 bytes
SHA-256: 9ded9957ff1aa0b2c8fd53f9409fa126ca02be5b0ba5922dd513d50c2d8391d1
font_01_sfnt_off00012865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12865 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001407c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407C 10948 bytes
SHA-256: 3771556560af9e14534c17d439dfca554a5d6e57b46472cc678c58a3a764b4ef

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