Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ea1322085f8f00…

MALICIOUS

PDF

68.6 KB Created: 2021-09-09 19:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 9c3a68005dcb7590a89f6ed0cd1d87be SHA-1: 2ab683c7fb4a9800e821f833aee33f8dcdda25a3 SHA-256: 35ea1322085f8f001ccd600bf163cc4091edbcff3a94dd70be4cd15d94f23781
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 0.9956

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://ohadalegistrocbarter.com/ckeditor/uploads/files/wobojidadu.pdf In PDF document text
    • https://myreply.mobi/snappshott/editor//file/78054278947.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/31686661992.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/62968831170.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/85745221848.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/dotubadirasat.pdfIn PDF document text
    • https://majubesar.net/contents/files/29063735223.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/74280352445.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/28673170038.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613588e17ec49---45860450868.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/82439447823.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c9fe43b28---disef.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/nekap.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/68359998374.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/pijugimelog.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/89807590098.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/vawefokakafilun.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/71361655910.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/worebivepitud.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/wamagitoj.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/tibogodi.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/fitifilisijuvevi.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/29526562989.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=seven+psychopaths+streamingPDF 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_off0000afb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB7 11032 bytes
SHA-256: 3fccafb01b84702ac4c3f110d180d882d5fd582fce43d43e0c7024f65fe7a611
font_01_sfnt_off0000c944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC944 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE156 14440 bytes
SHA-256: eb3358dec80f7c4c865f078d02a1aa3ecbd0637adb1898c87f3c6c08559e8e4f

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