Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e77519529195c90…

MALICIOUS

PDF

79.6 KB Created: 2021-03-16 11:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7a57b22e8900242622f34d21924e66bf SHA-1: 2f0c48204ccf458a408e699c60da26039155ffa0 SHA-256: 4e77519529195c90d99da25dce75df27982564083469ab8f53b83925a9a80228
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=craftsman+ys4500+no+start PDF link annotation
    • http://jugepawe.medianewsonline.com/20_000_leagues_under_the_sea_free_download.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/how_to_thread_nelco_sewing_machine.pdfIn PDF document text
    • http://fragcups.com/los_juegos_del_hambre_sinsajo_parte_2_mega_castellanonpe0q.pdfIn PDF document text
    • http://dommasters.site/986457115828nd13.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/SF4ajd9/cosmos_possible_worlds_episode_1_watch_online_free.pdfIn PDF document text
    • http://jakartapro.xyz/46640522064rda4m.pdfIn PDF document text
    • http://erse.xyz/detezoxazerel36jq3.pdfIn PDF document text
    • http://fakoxime.iblogger.org/ctet_question_paper_2_2017_with_answers.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/fall_guys_wallpapers_4kqj2no.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/wegdgjn/96344661037.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/academic_writing_book.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/gdjhVif/16250581563.pdfIn PDF document text
    • http://ipoteka.net/buying_land_conservation_easementkysjd.pdfIn PDF document text
    • https://cdn.sqhk.co/lizubenesowi/heKhAhh/17391976670.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/essence_anatomy_book_downloadh7qtp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://solegevolet.rf.gd/can_acer_aspire_one_run_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ce4769-74ab-4635-8ab4-447c63ab4d4a/4027381756.pdfIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/96_ford_ranger_ignition_problems.pdfIn PDF document text
    • http://widusop.atwebpages.com/suxoromigalafan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59aeb678-3176-45e0-a8f9-1c9db5bb2f34/33574162233.pdfIn PDF document text
    • http://mepuzoxol.rf.gd/77818427040.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 5244 bytes
SHA-256: 57115a1722c3214a18405ee2a850cdd7551489cd4b6e75994161109f6eab4407
font_01_sfnt_off00010c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3C 10900 bytes
SHA-256: ee46087e05291f384c706bc2c74ad0dfbcde46bf78755775f5dba3a041cef561

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