Malicious PDF — malware analysis report

Static analysis result for SHA-256 200052c070e84b0c…

MALICIOUS

PDF

74.1 KB Created: 2021-04-02 07:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cfe3e77c0d299c596c08e43a5707a183 SHA-1: 7c78e3f0e760dad514c48fd03b35ba7eb56d2ae5 SHA-256: 200052c070e84b0cbfc89a9e8f6eac25797896a21cea1992e6f5f5e6e92c15d7
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or domains with suspicious keywords, indicating a link farm designed to redirect users to potentially malicious content. The PDF structure itself is also noted as a link farm, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=d%2526d+xanathar%2527s+guide+to+everything+free+pdf PDF link annotation
    • http://mumixeniseja.iblogger.org/bullying_articles.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/4o9jjN0/mosunibux.pdfIn PDF document text
    • http://xsafak.com/10085297799rh3sl.pdfIn PDF document text
    • http://lnstagramoriginal.com/sword_art_online_manga_orderg7t3q.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/pet_architecture_bow_wow.pdfIn PDF document text
    • http://lynciguest.com/mifajotekupowoippew.pdfIn PDF document text
    • http://duxeluwezix.iblogger.org/osrs_inferno_gear_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/dEjfrgh/gmail_app_dark_mode_samsung_s8.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/gQjbhdX/97705095938.pdfIn PDF document text
    • http://idealica-columbia.site/the_republic_plato_book_5_summary5nyeb.pdfIn PDF document text
    • http://fruit-ital.space/gikofigokutotipefopejimugkt8m.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/e3ieaki/download_doodle_alchemy_animals_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_89aad7254a084875bd3bd4bbc8177f6e.pdf?index=trueIn PDF document text
    • http://zowomasi.rf.gd/wukapewuleguketimirokase.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_00057dc941604a30b6c1a7d7e529d9f0.pdf?index=trueIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/hakko_fx-951_s-e_error.pdfIn PDF document text
    • http://mavafakubew.epizy.com/fanikolowewixovibu.pdfIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_0fa358c4b33e40d498547acb8bc8141b.pdf?index=trueIn PDF document text
    • http://magixek.rf.gd/download_uud_amandemen.pdfIn PDF document text
    • https://dfabac9c-3a78-4d86-b112-ccf1750024e9.filesusr.com/ugd/b46e2f_5822dbe37d8c42a98ca17fdd26449992.pdf?index=trueIn PDF document text
    • http://merilejefug.rf.gd/fairy_tales_story_books_free_download.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_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 4156 bytes
SHA-256: 9253c4ec90eb8b217ae91b3aef6412788d3d1419415539c5cfb70110cf842fd1
font_01_sfnt_off0000f579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 11424 bytes
SHA-256: d8ade57cec4ebf37c02a37cc736c832b9c3591cc4816943e9a9f6ee8529f161c

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