Malicious PDF — malware analysis report

Static analysis result for SHA-256 04159d1768584480…

MALICIOUS

PDF

78.0 KB Created: 2021-06-09 16:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be077415989b9335473a5da61f912276 SHA-1: 947938bd9f8e2c73327931a980db6a75a4f0cd90 SHA-256: 04159d176858448036253809460384e73c1d5a6048b5a6811f5a0b2d996c5b6f
126 Risk Score

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 0.9990

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://ketchas.ru/pbw?utm_term=royale+high+discord+trading PDF link annotation
    • https://komanogorolelew.weebly.com/uploads/1/3/1/3/131380356/bevov.pdfIn PDF document text
    • https://renugukid.weebly.com/uploads/1/3/0/9/130969315/38c8a9eddd.pdfIn PDF document text
    • https://rapodiduwegez.weebly.com/uploads/1/3/5/3/135311990/6366740.pdfIn PDF document text
    • https://wenozujilemufo.weebly.com/uploads/1/3/4/4/134456287/539432.pdfIn PDF document text
    • https://gitojigobireko.weebly.com/uploads/1/3/4/5/134517815/zomaxifabew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/65743593793.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/mabagevogetixewoga.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/como_activar_autocad_2014_64_bits_con_xforce.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144645603/cuanto_es_un_dm_en_metros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453aa90f-a629-419e-bf5a-df94864d8926/a_little_life_hanya_yanagihara_movie.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144944562/cutting_edge_elementary_download.pdfIn PDF document text
    • http://wotetidi.pbworks.com/f/layer_poultry_production_manual.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144456540/grammar_active-voice_verbs_and_passive-voice_verbs_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/093c3625-7e10-4065-ad56-adb2eadea880/50235700743.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/shaun_king_net_worth_nfl.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/w/file/fetch/144741321/zaziwaz.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/f/18914458590.pdfIn PDF document text
    • http://wawexigore.pbworks.com/f/ejercicios_de_fracciones_equivalentes_para_tercer_grado.pdfIn PDF document text
    • http://gabumur.pbworks.com/w/file/fetch/144593892/learn_javascript_in_24_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246be57a-f685-48f9-83d8-5b97f98f2e5b/applied_statistics_for_engineers_and_scientists_levine_free.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/tamil_childrens_story_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f524777-e9f2-4064-b784-7b7e7a821198/wiwiwoxolexib.pdfIn PDF document text
    • http://mukonisu.pbworks.com/w/file/fetch/144455256/punofigudexozetupijusux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f1f6c0-7c56-43e2-a0ab-5b8a8145442f/is_matcha_latte_from_dunkin_donuts_healthy.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 5308 bytes
SHA-256: 521f9d2632c2b3d9e55a2a1386600093dac621fc03989cc22118834a074d36ec
font_01_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 11492 bytes
SHA-256: 1088edaaddb4a9f86501a7a9ddb31eba16be085ef7268ce306ccba4bf16d9d44
font_02_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 16204 bytes
SHA-256: abfd345a6ea1e62b83e5b81470e97c0bb38d81b9d626d8407e597eb2d2192f0c