Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b94bb88282c9011…

MALICIOUS

PDF

72.4 KB Created: 2021-03-24 16:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1cf32bc1784a711ebcd92b9fd2a4d245 SHA-1: 6507be9c56c456e446b728f45f6a70363369e63b SHA-256: 6b94bb88282c901194a172c51bdb4d79826ba5bca6b0fdf92cfb66fd53eb96d2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('resalured.ru') that is likely part of a link farm designed to redirect users to malicious content. The PDF's structure and the presence of external URIs suggest an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=libro+biomagnetismo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414166/normal_602cb1e7df9a5.pdfIn PDF document text
    • https://dupevikalibo.weebly.com/uploads/1/3/4/6/134659617/tilesuraxepija.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/bodapetobunirobuve.pdfIn PDF document text
    • https://xaviloxoganobe.weebly.com/uploads/1/3/1/3/131383750/runipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_605675563cdd1.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/nawasipamewavitanoxew.pdfIn PDF document text
    • http://sibogufurab.medianewsonline.com/mobb_deep_survival_of_the_fittest_instrumental_mp3_download.pdfIn PDF document text
    • https://zavomejuguz.weebly.com/uploads/1/3/1/1/131163615/gepoletixevasomot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://96daf755-36ed-4ece-a185-bed8db3f70ea.filesusr.com/ugd/a95cda_75fd1f5d0e024690b215773a2c3b0083.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/11581b51-b9d4-4c50-8311-7de40356678a/54705699653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab7880b-fe18-4243-9e0c-9b050502424e/elder_scrolls_online_beginner_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/iso_9001_standard_2015.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_08c0582d5bc042d688464c444fe39b49.pdf?index=trueIn PDF document text
    • http://wojibikifi.myartsonline.com/81001087909.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/kugizegew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e965d3-9e14-41f7-a89e-71cf3aa53a1f/what_is_the_coldest_place_in_canada_today.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_ab2cf3d944364bb6ac27afb7f7ac034d.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_71ff655d712b455d9e114efe12b2ba84.pdf?index=trueIn PDF document text
    • http://ranitirunom.myartsonline.com/vokugevusazapebugox.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/rerezofidilakidakojipelaj.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 5408 bytes
SHA-256: 8581464bfeda5b023fb785d33ad229a1a7331928f162bb0dfbf1cba5346c593a
font_01_sfnt_off0000eb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 12248 bytes
SHA-256: cb82b94af6fe54288b450c7835534f2005dd7216fb07f94a57a5b4f2b3d6abed

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