Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc77f845eafeb32…

MALICIOUS

PDF

81.8 KB Created: 2021-09-13 09:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 01479f011e63bf449c47b553b2d60e50 SHA-1: 917d36676b546c07e175263b9fcddbfa6ab453c5 SHA-256: bcc77f845eafeb325de2a489f0d108cdde5f32b4e2d2d0f32d6fc243130e851f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and the presence of external URIs indicate an attempt to lead users away from the document to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=the+room+2019+watch+online PDF link annotation
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/59684834539.pdfIn PDF document text
    • http://ipublicity.cz/data/file/kebodegigogimujada.pdfIn PDF document text
    • https://vitanov.rs/files/texanixisategitilofani.pdfIn PDF document text
    • https://12tiga.com/contents/files/vododanuwixixedabujo.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/14999543545.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/wuluzujufux.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/80569224583.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/8323179976.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/70299436875.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/47305558906.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/mfre2mof92g3qbv1n0isvf3lv8/68028230541.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/gorevudorosumuzopenufukog.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/42332848687.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/68192693879.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/virurusaxagepe.pdfIn PDF document text
    • https://gilbertems.com/videos/file/94515867088.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/lejakadivirexelifij.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/vesuvezovuxorosotaxoxam.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/lolasorutogixanekapa.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210902211805.pdfIn PDF document text
    • http://djapm.com/userfiles/file/34969264463.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/19838149381.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-2/20210902090050211808.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/ludoroparibebobolibo.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_off0000da38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA38 17844 bytes
SHA-256: a2c420458324f46377f91c8731d6b725c4073f06c16e17bd23c09e0767d48645
font_01_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001206f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206F 10836 bytes
SHA-256: c7fd2d9da31963caeca68941711824abc7582ba2af938b864fb2dcb309c2df8e

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