Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d95f79980ff160f…

MALICIOUS

PDF

91.4 KB Created: 2021-08-10 16:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ddb846a3cfc8942e0b2ec00f9b09759b SHA-1: 3f4db3c673b89572ab06a13c82232fdb3f75b7a1 SHA-256: 7d95f79980ff160fd26453f7c30b7858fe7d34a2c833f70313223de314a264f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farm patterns, suggesting an attempt to redirect users to compromised websites or phishing pages. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings indicate a malicious intent to exploit user interaction with embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://medvor.ru/uplcv?utm_term=the+lion+the+witch+and+the+wardrobe+summary+chapter+10 PDF link annotation
    • http://xinyuemu.net/assets/202108/files/20210802210108660258.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/10511758755.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/d06a6cfe4038c3ad6359d7ada45cefe9/9275594224.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/61377722928.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160977afbcade1---muguzikogiwupove.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/4582935429.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c652939324c---fodekerenudukomide.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/5k20erq9kd9jo3rfqvml0oigo7/pugugi.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/3ab2190f4a15494cccf2f722397e9c6d/lokaravuvunupupajul.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1281c57ba---23248915504.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/jptdcguk393cu0d7hfc39iocg7/wimorataxij.pdfIn PDF document text
    • https://cristalensi.com/public/File/fonizebomaxedag.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/12887549195.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/68399922974.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082bc14c9fa0---bajawipefunadawuwodema.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/wofivogubotojajexaxir.pdfIn PDF document text
    • http://nenorm.com/files/files/vefibubo.pdfIn PDF document text
    • https://citronel.com/userfiles/files/dijusanupaluvawosolaf.pdfIn PDF document text
    • http://globalaircrafttech.com/ckupload/files/jukuwiwavolulox.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/kamubapivisaxuzi.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094e2810c048---35043696422.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/vofikemuxasarivodupa.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/kifizunogagukesa.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/v4qbhe6fqp07ftqve0kj2h3het/77072150597.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093b45253645---17126376558.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_off0001013f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013F 11356 bytes
SHA-256: 93f479611b8a6f89716d0da6db88fe0066547a1adc1b1df6eb5d8c0480a45eb4
font_01_sfnt_off00011bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAC 16768 bytes
SHA-256: 47474848a75b0a380ac1e89c50ed3f723a9048c8a066a608f90d8e35ff478084
font_02_sfnt_off0001472f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1472F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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