Malicious PDF — malware analysis report

Static analysis result for SHA-256 301bbb61d762bd9e…

MALICIOUS

PDF

150.6 KB Created: 2021-06-02 14:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d17f35e1c33f3ed8f49cfc840f6cb1d SHA-1: c9db485751d2d65bca115274285c76b902511282 SHA-256: 301bbb61d762bd9ef3decab7e41b6c770cd9f5c0294c9c085044720d5ee67e11
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 0.9924

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://leonvi.ru/123?utm_term=iliad+investor+relations+annual+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409604/normal_5ff4c6ebd12b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_5fdbdfbc8634c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_5febf827bb6b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_603d2e647bb53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_6027601c403e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5fdb10db9f2f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491152/normal_6006b52859974.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://mumasenekera.pbworks.com/w/file/fetch/144423906/how_do_you_know_when_di2_is_charged.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144497076/72666035486.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/free_construction_daily_report_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72217e3e-6bfc-4403-a47b-7154f560079a/toms_shoes_ethics_case_study.pdfIn PDF document text
    • http://kukepofarit.pbworks.com/w/file/fetch/144470376/nimizosubuzenalo.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144491220/pigelowe.pdfIn PDF document text
    • http://lomubel.pbworks.com/w/file/fetch/144497187/how_to_get_free_robux_with_pastebin_2020.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144426798/8823306598.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/mxq_pro_4k_firmware_update_2019_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09601af1-1a17-4780-8fff-e99b31764bd1/tukivazadorarazopur.pdfIn PDF document text
    • http://pagorevet.pbworks.com/f/epson_status_monitor_3_windows_10_64-bit_download.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/w/file/fetch/144505065/juwonusejug.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144412248/marixijofazep.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/f/does_bigger_leaner_stronger_work.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144465243/how_to_reprogram_a_tv_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40450f0-561f-4d64-acce-f4960f7196a3/werewolf_game_all_cards.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B666 11188 bytes
SHA-256: 7b793531c7dcc7cc8e44097f5efe6a04b5b5ba419a1df7a85d8f2c393458ca22
font_01_sfnt_off0001dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAFA 4832 bytes
SHA-256: 22a6e68ba3f8c11925afefc3bc5c39574ebd3e60ef1eeb842aa23bb4bad41337
font_02_sfnt_off0001eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB70 18100 bytes
SHA-256: 357e8779d707a0e1c8ddb64020fac14c636f3bf0eca9147a4a4fee68c7a682c5
font_03_sfnt_off00022027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22027 18016 bytes
SHA-256: fa7bf10c784e52b35160b785514a7548071b03809fe2666a9435ff4e4539596b
font_04_sfnt_off00023bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23BAC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e