Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b08295704c1ff53…

MALICIOUS

PDF

76.1 KB Created: 2021-09-10 08:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 61c0e4811970d808d3764c29a8b50b1d SHA-1: 888ba5826032e2b63d3ef45d6c54ac44aaa76db7 SHA-256: 2b08295704c1ff5343dad12f6cf03d3cefec0b5735e1dac083004553e336f253
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external domains, suggesting it is used to redirect users to potentially malicious websites. The PDF's structure and the presence of external links indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://infrive.ru/uplcv?utm_term=android+studio+arduino+bluetooth+example PDF link annotation
    • https://podereilmontaleo.it/writable/public/userfiles/file/7336289187.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/76336080221.pdfIn PDF document text
    • https://gdaniec.com/upload/files/novumawuxi.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tavojopufix.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/34090509489.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/lelubaweto.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/96444248872.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1630970283.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/74586383466.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/25424194304.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/31420648504.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/jetamujevekimunifog.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/vonadijitakufiwamejo.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/60217478046.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b3fc02587---75418332643.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210904131810_kb2ms0.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/8792749105.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/mifowexuborodorubiv.pdfIn PDF document text
    • https://endobible.com/userfiles/file/48067749741.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/669vsn9gt4u07cdtneq9ji2kj6/91051816129.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/muxagupikapamevipa.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/51183911490.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/figijijibogo.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56316293360.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/97345466420.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_off0000c575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC575 10980 bytes
SHA-256: fa5748fa0db57e83507c4244ff59bdea689d3bcd95be71e2ca6a45dd9c9fbcd6
font_01_sfnt_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A3 16892 bytes
SHA-256: 29cf314ed34897767c3de3b34495bf98a6bf93e1bbb35026c6816a8d3135d24c