Malicious PDF — malware analysis report

Static analysis result for SHA-256 469e70f0dfb5d743…

MALICIOUS

PDF

77.8 KB Created: 2021-03-11 06:35:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5efe8bde2c54e5b82675778c1eac1b43 SHA-1: 3a45a91fb570858cc009e81ddc41ea0a40cad8d3 SHA-256: 469e70f0dfb5d743585d5633c05e869ec00c9a1cca9f31ffe248d73801fe7687
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 0.9998

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://leonvi.ru/award?keyword=fairy+tales+story+books+pdf PDF link annotation
    • https://cdn.sqhk.co/mevexobuzur/ip7jFji/71623069436.pdfIn PDF document text
    • http://thrivewebs.com/9234655854983x9b.pdfIn PDF document text
    • http://potolkilife.ru/intermediate_accounting_15th_edition_chapter_15_solutions1k83v.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/gchebgh/granny_barbie_mod_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/fasegibuniz/eL8ijif/business_analyst_process_mapping_tools.pdfIn PDF document text
    • http://wavokumad.iblogger.org/57225936469.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/B1hjhhk/best_free_streaming_software_for_android.pdfIn PDF document text
    • http://aov.one/50_basketball_plays7569j.pdfIn PDF document text
    • https://cdn.sqhk.co/bafebolabefo/dhdjf5D/50767945318.pdfIn PDF document text
    • http://startbastar.online/yin_yoga_poses_sequencedw2o5.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/modern_warfare_servers_lagging_august_2020kneo5.pdfIn PDF document text
    • http://jomotew.iblogger.org/brother_birthday_video_songs.pdfIn PDF document text
    • http://ottics.ru/purple_bed_sheetsjhtyr.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/hagjAPK/xapupop.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/551cabe0-a1c6-4fe7-ab5c-bcf03b24a0a4/how_to_set_swann_dvr_to_record_all_the_time.pdfIn PDF document text
    • http://fegosuzix.epizy.com/kokia_fukurou_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf92cc7-861e-4c21-8480-54eb3e8dfb3a/sonicwall_tz_100_manual.pdfIn PDF document text
    • http://figejadinopi.rf.gd/house_on_mango_street_soundtrack_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f3a0f2-afd7-4c7a-a2d9-1032040750ca/suing_a_county_judge.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_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 5296 bytes
SHA-256: 3fcf34025c9f476f8693d8bc701bb893bdf6378b076b4fc4bb903d89052d9dd4
font_01_sfnt_off00010627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10627 10428 bytes
SHA-256: 5bcdde0afb5797406727e6e1e74fadaf4743845c9c1e81874fce46afd035605e

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