Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9389149cb51aed…

MALICIOUS

PDF

81.9 KB Created: 2021-09-03 06:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c56e1bb4e10fbe67f834d6b047d408d4 SHA-1: 49dff40ec9f43ad77c945213532c5b9fa1dbdd02 SHA-256: 1e9389149cb51aed978cc5800a49180b69bbded0c00823feb695db7acda9c998
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=state+of+california+trenching+and+shoring+manual PDF link annotation
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160758b6ca6795---buvevadawalobesu.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/bodpjai9e37kqdoj0maaqjndh0/89553078106.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/vugefakafinalazeku.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/d9fdece3f8f34e37b84df4aa60f8eff8/jukijimefodubaruwuwof.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/44173158712.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/49368990351.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/30304950289.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/kalepagedifor.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/35305191040.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/gi6upfh8d8usuer2bms83nivkm/menarav.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/fajogizibezofagux.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/60568490452.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/0hbiafkm4kvkmhtao0e0gfqjqu/xigikenofa.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/fofofukaxi.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210613154826_ppsgcn.pdfIn PDF document text
    • http://vodnik48.ru/content/file/56429528361.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f16901684---23871551698.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ca62c20986c---ritivonatadulexaw.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c399f40dbc0---49515788197.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/907982684.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/22103630388.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/0429cad10fd9e74b30019bac4daf355e/tuwilononivarenasonubif.pdfIn PDF document text
    • https://ayurmitra.com/files/file/79154634493.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38729561f---58909536569.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c606aee802b---86540499012.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_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 11096 bytes
SHA-256: ed6c0b044b86f5bbf7870d76f251e20b4d8b4f83e6f975fedbe88992717dfb71
font_02_sfnt_off00010c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 17296 bytes
SHA-256: 1d923cabefab89ec3ced0217828dd19ae62b537bfa676d8b0cf7009eae88f6e6

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