Malicious PDF — malware analysis report

Static analysis result for SHA-256 932e37091e41313e…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 05:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d9d3067590a4b60e0ca04fffcbece138 SHA-1: 765e70283c86954a704792772c6253f2b3057ef3 SHA-256: 932e37091e41313e5c9e7421a3e43f971b97ce4e61f970ad5dcde6ab6839b8ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://medvor.ru/uplcv?utm_term=evocreo+mod+apk+unlimited+gems PDF link annotation
    • http://mhinflatable.com/upload/file/rapazuwiz.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210902230045.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/kowozav.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/52672864430.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/86675107121.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/16077899743.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47353100910.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143d06063ca2---fexagojabub.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/24485054621.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/91004901410.pdfIn PDF document text
    • http://skisun.it/userfiles/files/53837021436.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/34891846624.pdfIn PDF document text
    • http://hmed.vn/upload/files/32093703590.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/48835315391.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614932f356b5f---43038330457.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/c7a8ea245de798cfcb10ba91fe7008cd/fafukudeluxa.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16134dbc0b8d51---kezujeredad.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/41340309283.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/pifamumifabusuveb.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/70569273228.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/paguzumerinadekovagezina.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/xizusawukev.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_off0000ad1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC532 11100 bytes
SHA-256: 9014b66449b6c0f6101d09aa540e9eb21291e5d5f331370c16f3d886feefc53e
font_02_sfnt_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 16028 bytes
SHA-256: 3f38d06630cf2c734d166cdf67b389c268127d2b89834ca563580ecc4dadba04