Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5d7c642aba434d…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 04:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 285367d9c237d5a059304e47da4d1176 SHA-1: 42ec4b2433b2e38ddfe2ff5c2389f55f06adbb8c SHA-256: dc5d7c642aba434dc6b01117f84fca60d585f0928dd90e1313c67e22f44d0cd4
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 0.9951

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://musikkursus.dk/userfiles/file/fukug.pdf In PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/99213700012.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/3653295278.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613755ec89554---34101333109.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/newawojofelojijidis.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/24866482590.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/31453242902.pdfIn PDF document text
    • http://hybsch.it/upload/file/rerigivozivobepe.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/felefarotuxojokepuda.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/pivebu.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210916_F394D4DAFBB0324B.pdfIn PDF document text
    • http://chipgene.com/image/files/20210905_020100.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/gozoti.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/wuwiduxujanudoberevenekaw.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613529a62bff0---dozumodawolokazadevo.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/famuxele.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/14893154930.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/10068743642.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/xokisefefeleje.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/febemadexu.pdfIn PDF document text
    • http://aweibel.com/Photo/file/94456288614.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/59697599704.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/finobite.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/sufut.pdfIn PDF document text
    • http://ondamarinarest.com/upload/files/fewivinole.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=you+are+my+princess+quotesPDF 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_off0000ddbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D4 10832 bytes
SHA-256: 202e543d0bf0696c5d8ec19978d37658d8ec3ef098e5438b90eac7a31acd9811
font_02_sfnt_off00010ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDE 18020 bytes
SHA-256: 4a823d25c7dc6b83653f90c57bfb6117e24badfcaaed0fabf044fe68183b4fb7

Open this report in the interactive analyzer, or submit your own file for analysis.