Malicious PDF — malware analysis report

Static analysis result for SHA-256 3679ccff791f744e…

MALICIOUS

PDF

89.2 KB Created: 2021-08-22 02:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a5ca2df5b111ebfd2b1248b1c6364e3b SHA-1: c33e73c394cece3cf0a9506f88ca03a240aa5ce7 SHA-256: 3679ccff791f744e938f82c0060950355fd421b0c00ec08f2e7265dcec53331d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to potentially malicious content. The PDF structure and embedded URLs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1734cb828675a8ced90f205bb3e7e86a/setitinafame.pdf In PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bffaaa8cb---fipiwusopunuromosup.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/lonivizas.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/d4b5c83755c0033fd7bf1bf0a20438eb/pezalomisewagolete.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///towiberivoxe.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/luzaxitiwofekeru.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/80923671016.pdfIn PDF document text
    • https://caffedisanto.it/file/25641595696.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/47620190055.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/68682940255.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a047ea94554---nadedejulojowe.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4458d004ae---pojarotebok.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/xavuponakepetu.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/62329670603.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611035e58d4f5---89543986942.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/37b97e6e297f2f2914dbcae22fc807fb/zezexafuvazotedopes.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/i57ea9pfuer93schdj9p1m1upi/69525810394.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e904d4b016---11903140198.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/poxamov.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c577de252bfbf04bfe57116cefa7c0c8/14838556273.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/welinogiw.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7mqohmrnh21paftn5gklo695dq/suzulumirukofaju.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/40445370467.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=most+common+foreign+words+in+englishPDF 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_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 16732 bytes
SHA-256: e3aa6f14c93a5e4cb8c383bfbb1639a5461561da1724db1edd6dad2abe58a932
font_01_sfnt_off00012550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D67 10840 bytes
SHA-256: 8c20f52cb1b0a1c185b51d1d84531953b6525b1dde0d10321cdff1c385c49684

Open this report in the interactive analyzer, or submit your own file for analysis.