Malicious PDF — malware analysis report

Static analysis result for SHA-256 7058aee72a15964b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-16 11:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8b7fc5854817ca63fd49e76a16b2ffdb SHA-1: 6e684e3e4da5255e44bc96ea5ecba70a908685d2 SHA-256: 7058aee72a15964bf3bb51891040a93375a1dda2713d114998de677abd119111
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates an attempt to leverage these sites for distributing further payloads or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=browser+for+android+tv+2020 PDF link annotation
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e6bdc19bf---18569128465.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/93348894277.pdfIn PDF document text
    • http://gdgom.com/upload/file/210914092118132131vrhr7skupp19.pdfIn PDF document text
    • http://indemo.pl/Image/files/13829983978.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/punigedatodizuramewow.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/betafodedelewo.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/8257409703.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16142d785060a7---megutowimateda.pdfIn PDF document text
    • http://protok.pro/upload/files/3176720326.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/vojuzizijezejuvilenike.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/kivatagutumagenebowawum.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/xepati.pdfIn PDF document text
    • http://klenderbio.com/upload/files/10735068451.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/tiwidaf.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/16666344069.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/sekomulezaguwafipevovo.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/17171050302.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/dibek.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/nurowafogivilejelukubes.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/satonutunimapofun.pdfIn PDF document text
    • http://computerdoki.hu/user/file/zurovixuko.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/damibovodekomujuropufe.pdfIn PDF document text
    • https://rjpexport.com/files/73166232556.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/73919217264.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614113c263047---sogimixedowubawaba.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

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_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 18316 bytes
SHA-256: 5ad78ea4da759324b59cc8fa5153d643035d630d330eab69f3a3ca53e78d9116
font_01_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12449 10748 bytes
SHA-256: b5854d5472aaf3fdba29692e4c0a2669b93886a3df6fd8019720fa57ef2dbd59

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