Malicious PDF — malware analysis report

Static analysis result for SHA-256 743bdbc4a91fdb43…

MALICIOUS

PDF

84.1 KB Created: 2021-03-27 18:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 74a28eefd0895baf314149c6bd4b41ed SHA-1: 8ee286c7d1a3d7fd61ff9ce1761a22374ce63288 SHA-256: 743bdbc4a91fdb439d2ecc9a0a809c62252cea5904779d4c29924a63ad374ff5
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 0.9992

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://maypoin.ru/wix?keyword=homelite+2700+psi+pressure+washer+ut80993f+manual PDF link annotation
    • http://geloritiveda.mygamesonline.org/43982659794.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/Ghjiija/war_gears_online_games_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_603ea1499e211.pdfIn PDF document text
    • http://palogaza.sportsontheweb.net/photosynthesis_and_cellular_respiration_review.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/delta_band_saw_parts_28-203.pdfIn PDF document text
    • https://cdn.sqhk.co/nazutupim/jgrjekC/patiligoted.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/hdjb0W3/guvigasijatuxikexapowina.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/hFribic/69360934107.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/loweze.pdfIn PDF document text
    • https://cdn.sqhk.co/lukizigerex/7je1rgj/word_crush_level_845.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fc85302454f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pitigapevede.onlinewebshop.net/isometric_piping_drawing_in_autocad.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/zajuradovuliwasutepev.pdfIn PDF document text
    • http://lepugip.epizy.com/zakevavefuwen.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/61084400651.pdfIn PDF document text
    • http://zujejuxuj.rf.gd/xejufisenekizawetugu.pdfIn PDF document text
    • http://jujobope.atwebpages.com/holt_physics_textbook_2020.pdfIn PDF document text
    • http://sujotoginejo.rf.gd/47457513358.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/how_do_i_become_a_certified_data_analyst.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/achyuta_ashtakam_lyrics_in_telugu.pdfIn PDF document text
    • http://danalegelelemi.epizy.com/cdf_and_statistics.pdfIn PDF document text
    • http://ponezokane.epizy.com/metabolic_syndrome_criteria_2020.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/aprendizaje_basado_en_proyectos_ejemplos_secundaria_matematicas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 5944 bytes
SHA-256: 5ef89dc73e7207565edccfa321aa77c1fdfb04171c73bca9401f36dc7aa4b782
font_01_sfnt_off00010f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 11124 bytes
SHA-256: 0701a97d9359d660a67d329c41d594a1c4e5cf5b1c58fecdff9d91b21b7ac463
font_02_sfnt_off000134c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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