Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9cf9eaff3415a20…

MALICIOUS

PDF

70.8 KB Created: 2021-09-16 02:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a37ad7b7b57709087f2f2c5119b3af81 SHA-1: 2383cce24a199fbaa4fae2e8d1f8dbf78e1fbb7f SHA-256: f9cf9eaff3415a20098ca6c9165dc194d402fb6a419a884c4492c4eda5640888
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 0.9973

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=my+dstv+app+download+for+android+phone PDF link annotation
    • http://gazosilikatnn.ru/uploads/files/bibigopebe.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/25760280350.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/suvaremefat.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/goxudofilomake.pdfIn PDF document text
    • http://gojjang.com/uploads/files/85476555771.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/11807446086.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/55066754634.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/61814817326.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/60364711242.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79665539856.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130520c4882b---63415759803.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/ee7a09a5d4a9f47b9c32a63117ec9b08/gejibumagezit.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/ligusopukefajuvuk.pdfIn PDF document text
    • https://songiadahoaian.com/upload/ck/files/40533284350.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/nofodusu.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/92296632532.pdfIn PDF document text
    • http://synfarm.com/upload/files/28903606239.pdfIn PDF document text
    • http://status.cz/UserFiles/File/92418127430.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/59959899575.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/kitupimedoripufodo.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109160532033010.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CA 10852 bytes
SHA-256: 47bba68e6f2a3eed77848361e52677e5dba5c3756b2961bc3a7dfbc56bd592d4
font_01_sfnt_off0000cbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E9 16472 bytes
SHA-256: e24f3e95cebc99cf465ac140b7e0673c8370306c67450dcd7e3853be00d59e35

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