Malicious PDF — malware analysis report

Static analysis result for SHA-256 382bf8bcfa6a93ae…

MALICIOUS

PDF

77.9 KB Created: 2021-09-21 05:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c6ebb3eec6a7ed10ac40b7af3f0ddda3 SHA-1: 4d57657157cfb0dee58e9109cebd677518df35f9 SHA-256: 382bf8bcfa6a93aee589205f3cae54ba13d5574df54f2dc649effd2cdfc2e68b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, suggesting it acts as a lure to external content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or distributing malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://canadanur.com/resimler/files/zoliremagixolazo.pdf In PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6607080250.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/fevez.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/gifiwimugedoloziminaxet.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36237589642.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/86610017479.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/tezusanabikomaturupo.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/xojuger.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/putikedajunewanelumopojo.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/o01rda1u8ul3l319ig71rnh3r13bep22/81283019204.pdfIn PDF document text
    • http://domuran.pl/files/file/96142981451.pdfIn PDF document text
    • http://aquatherm-graz.at/files/74384358959.pdfIn PDF document text
    • https://sanagustin.cl/files/xemefegeve.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/jigulurofeguzubizej.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/48481501424.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/gefijenefo.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/nolenemosinusodotimixi.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/kodifowokomiwokesubupuj.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/35259724409.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/23363322436.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e1c357e4c---votuxexumumafuvutape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+martian+filmywapPDF 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_off0000c913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC913 10500 bytes
SHA-256: f38230a3a760a4188df347b970739c66ac6ea87b443cce68dcbca824f288c864
font_01_sfnt_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 19248 bytes
SHA-256: a2a4503f84de47221fda2c3f67e28482c5ff678c3cacd905117890363529afbb

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