Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e932cf44d159915…

MALICIOUS

PDF

95.9 KB Created: 2021-07-30 12:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8b9c635bbed92ab9ec14adefebf0674c SHA-1: 55e0d4a357d9bea8218c6bfecdcf1e0f0a289755 SHA-256: 6e932cf44d15991565d03358362bcf59e4bc956fe4ab3382294d97bcf1a4d60b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a password-protected archive lure, directing users to download files from compromised websites. This suggests the document is designed to trick users into downloading a second-stage payload, likely malware, by disguising the download process as legitimate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=empires+and+puzzles+xp+guide PDF link annotation
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c3d0ea1fd---menawuravodalo.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/fizojokabivakavivavaxese.pdfIn PDF document text
    • https://zahnersatz.pl/userfiles/files/lezufelagajat.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b4b985b97---61457789143.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/97797414590.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/26/file/20210626_060022_200.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/68808585441.pdfIn PDF document text
    • https://iohrp.org/f_files/files/13999228463.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/52231779510.pdfIn PDF document text
    • https://oversaslogistica.it/file/waguz.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/25562143698.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b9512069d679136ae9cca42ba1b65a54/wixunezifaxup.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/03b82ded42799fd0697d9a5f86c2a06b/83248980329.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/wanevorisimodivibe.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/97522340576.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d4e9282db---dajojin.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/lotejige.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/gaxitox.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/d7c600867e5d3233e7082820918b60f9/94118807569.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5b8940451.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/5d370a90e7dbcf4d7e36c2dd9e863b83/48208429785.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/47854941840.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/51324993364.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/xidasewajuwibetizaxekoxaw.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/8vs0uv6c05raclbg125rkfm13c/85538165064.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C58 19616 bytes
SHA-256: 9be949723125d582c67b61ed690139b6d96c316d4d30ef72459a958b2e7f8151
font_01_sfnt_off00013eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECA 10760 bytes
SHA-256: 6aa1c1cba818a7581a4e40a1d9a92c3e341c90fce1dd35780608a82291000a41
font_02_sfnt_off00015747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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