Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60d44cd75e32b5a…

MALICIOUS

PDF

81.9 KB Created: 2021-09-19 20:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c65e8368b26f7d97324027ba34be6bb SHA-1: 98eee0ebec106f0374c3930c93200ce7ac0bb4d5 SHA-256: e60d44cd75e32b5a6e98ee9d0c81d2973d22129f70d0b067be14821f42128fb5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://chcial.ru/uplcv?utm_term=how+to+rotate+a+photo+on+android
    • http://qataminational.com/uploaded_files/userfiles/files/besimofetisol.pdf
    • http://www.motocams.cz/ckfinder/userfiles/files/bexitubop.pdf
    • https://glamweddingdesign.com/userfiles/file/fikipudivukutetipazal.pdf
    • https://nadrozmerne-sklo.cz/uploads/67333471429.pdf
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/69122264513.pdf
    • https://electroagro.es/pub/files/bipodaxiwe.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/bowovaxasi.pdf
    • https://slide-bearing.com/d/files/42726959274.pdf
    • https://alshamiltrading.com/alshamilfiles/file/giwetuwilunezokaber.pdf
    • http://jamalcar.com/userfiles/file/34056866600.pdf
    • http://sungwoneng.com/upfile_editor/2021/files/fowopofunu.pdf
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64246631445.pdf
    • https://lifecareproduct.in/ckfinder/userfiles/files/govewujupulutapoku.pdf
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/78974949438.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146242be0900---povazatusu.pdf
    • https://toscanafantastica.com/userfiles/file/66957328728.pdf
    • http://rqconsultores.com/userfiles/file/4057971147.pdf
    • http://anhbanglaw.com/userfiles/file/3877475961.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/16482106708.pdf
    • http://rialta.ie/userfiles/files/kexewi.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e72d155f6c---mezasenunedujovesore.pdf
    • https://charteriraq.ir/basefile/charteriraqir/files/3855399409.pdf
    • http://www.kowel.com/ckfinder/userfiles/files/1630465161.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d83a.bin
b3622b3fe9e1b506bee9bfdf5aa375ad6830415f0e9e9b483d5c109386f386f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 19332 bytes
font_01_sfnt_off00010ac8.bin
b5f41e0ce8b3a40b06b302bfd5b6356762d6ea38e339f09b7b95fb0f35b4ad0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC8 10352 bytes
font_02_sfnt_off0001220f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1220F 16792 bytes