Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0d8b6496764fae…

MALICIOUS

PDF

88.5 KB Created: 2021-09-11 13:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: b2aec8920f628284155611618278ef37 SHA-1: 4c016d83c912275e293e3aa7ac4386413c750efc SHA-256: 2c0d8b6496764faec4d8e4657c31d092784c4d8a3a5d70d8a54a9414c6202307
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pistant.ru/uplcv?utm_term=the+bachelor+season+25+episode+9+watch+online+free PDF link annotation
    • http://www.verneteco.com/ckfinder/userfiles/files/74583694711.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/tinubanomatupunutaresasur.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/zuxodavejededolimevo.pdfIn PDF document text
    • https://eklyps.net/images/file/zapomitelip.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/zipinebo.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/83873743095.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210904110719_960732456.pdfIn PDF document text
    • http://riviera.az/userfiles/file/91989021980.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/jugofe.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/wusemapesur.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/98408913285.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/sumelozitufekutugigutu.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/xigowikok.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/wovepodibonulexox.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/2fs8lio4b8f9e8j7p6trtgcjg5/74890367029.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/3930599044.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/60862111589.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/semunibanoputere.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/49977273480.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/sajonojutu.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/kakakamuki.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/55297804492.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/xokadireguvinuw.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_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 11328 bytes
SHA-256: 39030d6056ea526bb66d7f67a41197b73e7dbd324f49361815edc59155668297
font_01_sfnt_off00010b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B55 18884 bytes
SHA-256: 9ce6429608fcf94c5eea2cefa2723eabd9b496ba6a54a1480f957877fbc148fd
font_02_sfnt_off00013c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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