Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19b58b69edafabd…

MALICIOUS

PDF

79.9 KB Created: 2021-09-07 08:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 528e6bcf5a367249a4ae81ec5e89d065 SHA-1: 23094f84eed7eef72462771b42ec11781b2778cb SHA-256: a19b58b69edafabde2308e69081f6b86b25e28e3072fb46b6c491a66da5f872a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous external URIs, several of which point to compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content hosted on various domains, some of which are associated with disposable hosting or compromised WordPress sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://haohanlegend.com/Uploadfiles/files/lufatigosivoguduzejemip.pdf In PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/1606ee53873fdfc576bce1f3e1e92be4/megewisuzeke.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/9eff71faf436495ad88eceeb2f3d9f08/82871590254.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/81340684955.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qu0kcvarlbme63hbnhufp57qq1/jazonejofebigomuk.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a324d165225---zokapitogefijogekexitari.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/7285470786.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b9f20dc5---pudawaweroxilakor.pdfIn PDF document text
    • http://asustainable.com/global/file/wojaxavizupejidobowuter.pdfIn PDF document text
    • http://coffee33.ru/archive/file/tavijokopukeweve.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608817f75f7ed---wasoxevipi.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/zozoreputotazi.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/mugexitovib.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/eae29dcc6c7e637a99c207ac45339e12/65326707518.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160873891e2bf8---69761709792.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/wekuwiver.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16d4865d8e---93772997669.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/bejukikogorefe.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac506a8b637---90368401811.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/nalomewawakivefogilasipi.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/24512015519.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/solukuz.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/kekixoreniximawusajusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=airline+safety+management+system+manual+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CC 10916 bytes
SHA-256: 80be07130c3bed8c79410228e31635325e1533506edb8346c76a3ff81d7ead2f
font_01_sfnt_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 16388 bytes
SHA-256: 30ca84c0a69899432e77f617e00ea7761e875e2be7ceed314d708eac9756c7a4
font_02_sfnt_off00011946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11946 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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