Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc2a5f3848d1379…

MALICIOUS

PDF

74.8 KB Created: 2021-09-12 21:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 17e6d01fa9b928ee80a382cb21fd8e8a SHA-1: e1a622005e6fac7a2e0d49eafe9060be75150e7b SHA-256: bcc2a5f3848d1379739753732b66e772104158bfdc6e2d681c8875e13f12348a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by ML classifiers as malicious. A critical heuristic indicates the document's purpose is to lure users into revealing recovery secrets or private keys. While no specific family is identified, the combination of JavaScript and the lure suggests a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://mlbcsimleague.com/ckfinder/userfiles/files/lesemamolajux.pdf In PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/pubewubesisobelerapobufo.pdfIn PDF document text
    • http://halanmilk.com/upload/files/7527831892.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/valil.pdfIn PDF document text
    • http://kyea.org/imageuploads/dorefotalotadimidofa.pdfIn PDF document text
    • http://soupworld.de/upload/file/28239844923.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137074c62e44---fopewezovawape.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/84253355172.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/zedukiranamuresafurus.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/galufoximaw.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/24692472147.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/1374819613.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/48078832462.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/93751918645.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/68040827356.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/xokizu.pdfIn PDF document text
    • https://stvorki.ru/files/file/89559365738.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/83104267982.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/lufuguvanesij.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/76461530920.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386ef087134---zujoxuwenomuxes.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/gixeruputijekobeze.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/87200889455.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pi+zero+android+tvPDF 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_off0000c09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09D 10152 bytes
SHA-256: 72ddcc1457dada668559422922242e5e52cf7154979564c12751d0d3e63331e2
font_01_sfnt_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 17932 bytes
SHA-256: a4546b85cf72ec38e20a6e486b8cf900d3e20d57d36f4f52a8ce3ec7b22c3d83
font_02_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1