Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a138b04137ecd65…

MALICIOUS

PDF

84.5 KB Created: 2021-03-24 16:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 75c05fde457fb7f330531ff96623a7f0 SHA-1: 18b7568bf07d9920bd57881cfe016f1f26cf5e31 SHA-256: 7a138b04137ecd65c9a61f44ce8b5c0f213d503631c5dd4bbf71a9fc3f2bac4c
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 0.9996

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://crophysi.ru/wix?keyword=flash+games+76 PDF link annotation
    • https://cdn.sqhk.co/doxinotilid/c3Tq6ii/boponejajukegojidoxewidoz.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/249853297.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxaxebowe/bPHgi1i/verbo_applaudire_forma_attiva.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/nH4kjb2/93485512246.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/lelisidomumegaxawe.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/cgY1hb0/ikea_brimnes_dresser_assembly_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/jaagijf/54870032044.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/adrenal_tumors.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/g6pAjrb/68189635488.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/jihhtIF/zulelefofotinaw.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/arirang_karaoke_vietnamese_song_list.pdfIn PDF document text
    • http://pirunumilusarib.sportsontheweb.net/72_angels_of_magick.pdfIn PDF document text
    • http://legexebe.medianewsonline.com/rewrite_the_stars_piano_chords.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/vertigo_home_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/ciejchb/50432370323.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodusebivepakef.epizy.com/vitamix_blender_costco_uk.pdfIn PDF document text
    • http://vatonafikokex.atwebpages.com/37655420297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00b001c-0952-4524-a2c6-57db2344d511/how_to_get_a_real_estate_agent_license.pdfIn PDF document text
    • http://nutukame.rf.gd/30401695395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf56a155-7201-4f34-982d-96b0a3d6e940/dark_souls_3_covenants_and_rewards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b45ea28-c622-44bb-8aa5-43ef09d83354/roripereruxukasovivulej.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_off00010f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F73 5192 bytes
SHA-256: 9d66aac033c0728d80071f7ab818a1604ac6acfac7e2c027f41544ce8ac29d42
font_01_sfnt_off00012108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12108 10444 bytes
SHA-256: 649d7325c0b1909ca5be25c51434a844ae24303aca2d7dc6fb0ee867a6556e13

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