Malicious PDF — malware analysis report

Static analysis result for SHA-256 164f6e25ae27987c…

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 18:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: b6776f7cf647700b1945a58405dbec1f SHA-1: ad7ec2582d86bf0ad268f1b0e83aa3ff30c20dc0 SHA-256: 164f6e25ae27987c75f0ffdc581e8aaf5b73280afdf43c1149534b1a3c78b9e0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://langeline.com/ckeditor/upload/files/25920828826.pdf In PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/22607258440.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/77519520147.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/86069934016.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/57786561094.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/kigolorevifuxi.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/retapuwapewar.pdfIn PDF document text
    • http://www.ezmoving.com/file/70827819198.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/61755769085.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/ripopobagamulipu.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/6053651791.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/17449698030.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/71592734880.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210908061928.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/mepedinufumojenepofixij.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/rijogexeso.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/86593884858.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/16066943387.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/segokikujofaxidota.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/vugokenisovoko.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/58174831842.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/6492388412.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=fertilizer+technology+and+use+pdfPDF 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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D6 11148 bytes
SHA-256: 1f7a747b970f624ac65f6310fa20890901f2d9f350038c6bd3ef2c54e35322d6
font_02_sfnt_off000112ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AB 17608 bytes
SHA-256: 6297dd805c0aa1738e832e6a8f6087e04647fe1461b9f119d7aa47152ccc8de5

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