Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fc4b44119f9b90…

MALICIOUS

PDF

79.5 KB Created: 2021-03-03 08:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8a0ac031a1359f82480a26f85c38e941 SHA-1: 782086d66cd5c0ef1ff04451e2f0c7815220cb8d SHA-256: d4fc4b44119f9b901b9ce084e68c73462d9cdcfdda5cba42a226eba58e4e2b11
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The primary external URI, 'https://xezojetit.ru/wix?keyword=high+school+dna+replication+worksheet+answers', indicates a lure related to educational content to draw users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=high+school+dna+replication+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471256/normal_5fc70fb529e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_6014f0fa6bd3e.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/bGjibuq/fokikulutujowexoderemode.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/cgeK6oA/nupezolovidavekolufe.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/hUQiepX/fairy_castle_wooden_block_set_kmart.pdfIn PDF document text
    • https://cdn.sqhk.co/modurasisuwu/ijaCfO5/does_hallmark_movies_now_show_new_christmas_movies.pdfIn PDF document text
    • https://tejisapaw.weebly.com/uploads/1/3/1/1/131163851/famobosut_jujuju.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/wjdgzgh/texas_holdem_poker_house_of_pokerist_ps4_trophies.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/KcMkagh/electrician_apprentice_salary_colorado.pdfIn PDF document text
    • http://blacktea.space/cramped_conditions_synonymn4zyb.pdfIn PDF document text
    • https://cdn.sqhk.co/tovitaxani/hieijfr/groovepad_music_beat_maker_itunes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5fdc6b9b910ec.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/6hg4FRV/divatelajixereda.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/2OigqVY/fujuwodirifefagitezesut.pdfIn PDF document text
    • https://cdn.sqhk.co/baziwuwe/V0ge4uF/zewib.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/1ifihgi/52341850374.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 5452 bytes
SHA-256: 1a990d148c4dd7f80c572e8b70caf804e2da6f241b742aa985053a63cf70adea
font_01_sfnt_off00010d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 10284 bytes
SHA-256: 3f20c4cff9890c9fb03d2f5a9f9ea6d2e9a500733c6b5ead0be32fd63478a9a7

Open this report in the interactive analyzer, or submit your own file for analysis.