Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f1d3b0d6e0ffdd…

MALICIOUS

PDF

73.0 KB Created: 2021-03-31 02:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e057c1878955d7da26d975ee00489dfd SHA-1: c2606c657ef70c6d1f71046e5cbfde9a400c17ed SHA-256: 46f1d3b0d6e0ffdd308daba7f8bb9109223f35739ef746ecd7e01b035bb970fd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/wix?keyword=capital+cursive+writing+j PDF link annotation
    • http://xeberul.mywebcommunity.org/46595572793.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/livre_pour_apprendre_l_allemand.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/gchgQ0c/bawotim.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/jihjged/open_world_games_top_100.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/hrjj75Y/sling_airtv_mini_airtv_mini_review.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/allison_transmission_at545_service_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/sX5gcUY/kumanorarupa.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/RUKhgiZ/disco_zoom_background_video.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/wetuwupirazafejiwuxalawe.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/UgihUha/10991313125.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/chaos_knights_codex.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/59012824676.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ijAJpKG/creepy_siren_sound_roblox_id.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/8ygiMih/snes_online_release_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_192a9bbed2284188a126dcf13aa02dfd.pdf?index=trueIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/calendar_ortodox_2020_printabil.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_6e8392ce260f4b8e83845ff8b3ac102a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8b2e1b-a704-418a-87a6-e94f826dd292/96254142422.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_86664c51b9634f8683409cbe80f3d5f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88aa2d9-2bf6-4242-992a-939e88cfe2d3/71762995463.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_c4bd23513f5e416f82085f766fb704d1.pdf?index=trueIn 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_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 5232 bytes
SHA-256: c807c0b814a09d965896001220a7d243b997c8b707870e0fb477f6edc77b2f06
font_01_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 10088 bytes
SHA-256: 16cefa7d37385b4c111f067f4471aaf52f7267d18719a049994481e743f8e14c

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