Malicious PDF — malware analysis report

Static analysis result for SHA-256 24414d4346bebf95…

MALICIOUS

PDF

80.6 KB Created: 2021-06-12 16:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3bf1fc3b590d4650f2586444fe8f2b7f SHA-1: d530cc35ceebecac9d32d3b2ffb8c7b980da21e8 SHA-256: 24414d4346bebf953bb2469e25e538b1b4983b2c6a340f954ab5214d54d4b24d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'catamma.ru' which is likely a phishing lure for a free download. The PDF structure and embedded content suggest it's designed to redirect users to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://catamma.ru/pbw?utm_term=archipelago+preset+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479435/normal_60c48afe734ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_6014b6bbc5711.pdfIn PDF document text
    • https://detasove.weebly.com/uploads/1/3/4/5/134594091/7a14e3119d3.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/1972f3aaf6cba76.pdfIn PDF document text
    • https://xekigumi.weebly.com/uploads/1/3/0/7/130776031/xifaruluveragav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_603c5444dc32d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144916488/forza_horizon_4_obb_file.pdfIn PDF document text
    • http://pajinap.pbworks.com/f/50355894006.pdfIn PDF document text
    • http://zolunegoli.pbworks.com/f/47407783302.pdfIn PDF document text
    • http://zidedabi.pbworks.com/w/file/fetch/144962712/mejabofowolalolav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c85077-0819-4375-a916-31e8cdc129a3/breville_smart_oven_air_with_convection_recipes.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/f/hacked_client_for_minecraft_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc49931-b4af-4b61-aaec-f57b24e57b64/garmin_nuvi_1390t_price.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/80647090119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2502ad29-cfdc-4952-8b0a-8f3c1df70c30/73937485769.pdfIn PDF document text
    • http://xewubamefa.pbworks.com/f/xizudarinawekelijapo.pdfIn PDF document text
    • http://wukisifoker.pbworks.com/w/file/fetch/145176696/mp3_cutter_serial_key.pdfIn PDF document text
    • http://mawasuwov.pbworks.com/w/file/fetch/144915768/40906725440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3780f9-2ba0-42d9-aeb6-a36f5ab47d7e/free_download_mp3_surah_al_waqiah_mishary_rashid_alafasy.pdfIn PDF document text
    • http://wimarolos.pbworks.com/w/file/fetch/144503712/integumentary_system_parts_worksheet_answers.pdfIn PDF document text
    • http://devopiporo.pbworks.com/f/human_anatomy_for_artists_the_elements_of_form_free_download.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/f/frog_and_toad_cookies_read_aloud.pdfIn PDF document text
    • http://gediripu.pbworks.com/f/42025696909.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_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 5496 bytes
SHA-256: 00d87ad371e4a1fe2e496e2b0f028c9db2f75e2a211832d9a93805f14aaa903d
font_01_sfnt_off00010c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C89 11260 bytes
SHA-256: 07782312377ea6690e497984f917e16a9ae8cde0ec046e17602c6019890a9e9c

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