Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed8a0d3e593c949…

MALICIOUS

PDF

67.5 KB Created: 2021-02-13 00:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0aedcd3b7d7e5a3fd78074b8b6e7d75c SHA-1: e6a59b96595fd60fdeb7522f50b82a9237f44362 SHA-256: 7ed8a0d3e593c949e663d77d78e19781b773b6f6d741afdacade6a1d79aba20e
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 0.9992

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://druttle.ru/wb?keyword=libro%20el%20poder%20de%20la%20cabala%20pdf PDF link annotation
    • http://vorecan.space/76867512318suj6o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401983/normal_5fedfa8e12965.pdfIn PDF document text
    • http://voicebftyi.com/35527002704y7pa9.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/5hghb7O/how_to_screenshot_with_assistive_touch_iphone_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_60226c0d22851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5feed93c25ce5.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/chhota_bheem_throne_of_bali_game3z3ym.pdfIn PDF document text
    • http://hookup666.site/ielts_reading_test_6_passage_2rqf6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_5fdc723f81d7c.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/hh82P3Y/sanevilixuzatabikesoru.pdfIn PDF document text
    • http://iuts.space/lokelazfk8al.pdfIn PDF document text
    • http://nosinoski.shop/lemokomanugovez6q5h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5fc8e8df22765.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/hcgiMgd/radioactive_symbol_svg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_600670999de0f.pdfIn PDF document text
    • http://firstreadersclub.com/idrivesafely_answers_unit_4eafn9.pdfIn PDF document text
    • http://logorag.22web.org/30714302759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tegofiv.epizy.com/xakomuta.pdfIn PDF document text
    • http://kiganume.epizy.com/39077355664.pdfIn PDF document text
    • http://bizotuku.epizy.com/52921006700.pdfIn PDF document text
    • http://getakufo.epizy.com/elite_dangerous_combat_ships_guide.pdfIn 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_off0000cf09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF09 5052 bytes
SHA-256: 146717754d416a748eaf25add4673ba6c4d6e1d5fd7cdfa03689791d965eca7e
font_01_sfnt_off0000e042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE042 11716 bytes
SHA-256: 9992d7982e11fb8f2de0b663113e63d944d9af980d1ed95a5de25985252ff1e1