Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90eeef986f410bc…

MALICIOUS

PDF

88.9 KB Created: 2021-09-02 00:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d28b956cf1b8d36b4bbdc7a851649f87 SHA-1: 1dcb06838244e27f9cf09c54f6522f07e92c4ba0 SHA-256: d90eeef986f410bc79eb3b77029076320755dadca8e23b2f582bf18b28897e73
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://cyberbirddog.com/userfiles/files/morivotu.pdf In PDF document text
    • https://aawyx.com/sites/default/imageuser/file/dunoxutuxur.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/poxane.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/c4df25c05bb8d95dea95044e298e0e28/69991208976.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/xijokezutobufoze.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717a5fcd85f---2711868213.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/34091999140.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/61818932388.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/42359219916.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/kimewigajiluvib.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a13668ab87c---xamufetagabapekakuwo.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/silufepitozonejasi.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d26df0371---43060137929.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/28cb8c8caff71880c25c1ba4bc7327e0/gakezuserupobudabubir.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/tejetowuvuzegemijotamuda.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f65743aa6fa---tufetununozonunupewirako.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc83537697---35295458429.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///57310792662.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/2780426129.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/246eb6813121548992d245e9d89cc984/93030484150.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/mejonikigudamogiruzaf.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o7t08brss6uvpllekdtpc77but/vivufisufege.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/30969444505.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612e08caed965---tezawovokogusetukixusatoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=intangible+meaning+in+bengaliPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00010bd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10BD9 16828 bytes
SHA-256: f51fe12b4d73d46e30dfca9f57d1a94524cd1fe3b40398807eda71bc3d4f98bb
font_00_sfnt_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 24688 bytes
SHA-256: 4c5ec0422352c53f6735cc41e0a8216dbc5284daad9ce007714c9eefbc812fb3
font_01_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 2000 bytes
SHA-256: e4cef98085d963829c3a6e5c7cd1bca07c0e6fa7f3ac616c6fbab71691c4bed7
font_03_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 10156 bytes
SHA-256: a226b0521e9c4bf3ee316b956b19c7cb536b68ec804ed61faa9dc25eb6f91e90
font_04_sfnt_off00013a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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