Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e849ea447f1427c…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 18:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6795da7f82b40c9a8eed884b9a914fd5 SHA-1: 3f6b9e23067d4b3415895b50a73c96f28561a712 SHA-256: 0e849ea447f1427c1f179a1d4c108a2c869ed2fabe6b1b701661c1125ac3ab63
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 0.9981

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://pixomot.ru/uplcv?utm_term=android+temalar+apk+indir PDF link annotation
    • http://schokoladenfontaene.de/idata/pifakozukig.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/barulifa.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021091307171832.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///kekutigedagoja.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/19871449094.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/20882109573.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613994a531f20---5744120573.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/f293db5e34f466a5eb4d600d27de783a/lopoval.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/jupejoxemapegito.pdfIn PDF document text
    • https://rwd.webseo.tw/upload/files/41036428096.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/lurebusalunadibeze.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/96584707584.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/posixuxibibilorijot.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/42114665760.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/legadegisasoda.pdfIn PDF document text
    • http://www.optimizecost.com/admin/ficheros_fckedit_subidos/zotasosupemisinukaz.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/67108204224.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45561897986.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/vevetawunuwuzijofuvila.pdfIn PDF document text
    • https://melz-feu.ru/upload/bemifapesu.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/wikajipit.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/lipexogobig.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 4

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_off0000d024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD024 19892 bytes
SHA-256: a116a947faab5a984d53cafcb82ef2b8b9ecc5a69e465abf26b65206b0669ab1
font_01_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 10456 bytes
SHA-256: f1c2517b11328bc802e663d837c50c01f903c3ea3b4bfa12660cb01250483394
font_02_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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