Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cc6fffb9405d34…

MALICIOUS

PDF

76.1 KB Created: 2021-05-15 07:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6bd1c74bf2c6a2af9e2f68be9b33de36 SHA-1: df000c40325dc45201e6e6240f239e33e63aaaaa SHA-256: f4cc6fffb9405d345d20a8ca11e0248ad13047e25d24cfb5a418aeff277e7d0b
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 0.9993

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://kuzutuzo.ru/strik?utm_term=the+making+of+a+poem+norton PDF link annotation
    • https://cdn.sqhk.co/vixukose/ijnVCmO/fish_triple_tail.pdfIn PDF document text
    • http://usecabinets.xyz/vebobeknwhry.pdfIn PDF document text
    • http://malespw.xyz/the_culture_map_similar_booksqw4bh.pdfIn PDF document text
    • http://teksol.xyz/whirlpool_dishwasher_top_rack_parts385o1.pdfIn PDF document text
    • http://pressit.fun/pejobisuporu8md2q.pdfIn PDF document text
    • http://reduslim-ordina.site/bavobiradarl5.pdfIn PDF document text
    • http://table-wait.com/813396850540t62g.pdfIn PDF document text
    • http://return-0.com/pekebasibujobidofipuu1lju.pdfIn PDF document text
    • http://ilkertr.shop/lodos_activadosboms3.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/NM0iehg/cute_gacha_life_characters_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/jbiaKaT/zodiac_signs_facts_aries.pdfIn PDF document text
    • http://voztrans.ru/the_master_of_knife_chapter_11tdgg0.pdfIn PDF document text
    • https://cdn.sqhk.co/wazewiput/iefhehb/mituge.pdfIn PDF document text
    • http://kalavar.xyz/54003182964zfh4b.pdfIn PDF document text
    • http://joxugeki.22web.org/vumapazumexobitopive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/769592bb-f39f-4f9c-9085-989fd7709783/kofijog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58efe0e1-ff49-4ba7-878f-621f901bebe8/sample_english_vocabulary_test_with_answers.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_d5fea9581def448194286ba62b260a4f.pdf?index=trueIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_1cfade3b1f414f85bc861b08c4025bd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6f4742-9f32-4187-8fb6-41d292f508f8/69897195550.pdfIn PDF document text
    • http://nukixoxekixos.epizy.com/metodologia_aprendizaje_basado_en_proyectos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023cfef7-4c11-453c-87e0-7808963db54e/how_to_adjust_draw_length_on_diamond_infinite_edge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b6fb0c-c3a2-4be3-9165-22f40ae67eba/how_many_seasons_11_22_63.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_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 5120 bytes
SHA-256: 913c263e7dced8408f29b829a70a5c443c0223ccb5473603fa08416b9ed8db33
font_01_sfnt_off0000fe44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE44 10856 bytes
SHA-256: 571294c829824d779cb8dc662007f7404cd0b2e9b4fb9bfa5460e410c2240a0f

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