Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1043f27ff4b3e5…

MALICIOUS

PDF

80.4 KB Created: 2021-03-23 18:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c00f9c823f032a3ad3ad3e65790bd07c SHA-1: 31f3576638fcf32f341c5b0821d74faaeaf11d2a SHA-256: 8b1043f27ff4b3e5dfc0451cfcfb58cc85c197e35c6b5c3763d18aa9702e1688
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://jottigo.ru/123?utm_term=shankara+movie+all+song PDF link annotation
    • http://vidclips.design/the_secret_law_of_attraction_full_movie_free_downloadr2ilh.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/QdgfDKy/old_man_s_journey_save_game.pdfIn PDF document text
    • http://vittorguxx.site/the_book_of_yeezus_authord4o35.pdfIn PDF document text
    • http://fagutoje.22web.org/verizon_fios_router_g1100_firmware_update.pdfIn PDF document text
    • https://cdn.sqhk.co/desavusomo/bBcgcjc/telecharger_portal_wifi_file_transfer_pour_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/8jdL7ge/commercial_invoice_template_canada_to_usa.pdfIn PDF document text
    • http://gujejimoge.iblogger.org/30789381001.pdfIn PDF document text
    • http://jerevuxo.iblogger.org/lirbi_book_reader_and_apk.pdfIn PDF document text
    • http://douchehq.xyz/epson_xp-820_manual2gvkl.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/fjeOVM4/jufuzurugudogopop.pdfIn PDF document text
    • http://profoto22.ru/questions_to_make_you_fall_in_love_new_york_times4ex56.pdfIn PDF document text
    • http://larekew.mywebcommunity.org/possessive_pronouns_worksheet_for_grade_3.pdfIn PDF document text
    • http://tibetterrier.ru/xejobidejajalisus2mo26.pdfIn PDF document text
    • http://tepafuvofes.iblogger.org/english_conversation_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/fjachbB/2245401687.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudugivifo.myartsonline.com/loxit.pdfIn PDF document text
    • http://kexojupi.rf.gd/voicemail_password_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2993bdcb-0a10-4f99-9960-a64c5fdfbcc1/fafim.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_3b9de3448f6447bab567d670728aedbe.pdf?index=trueIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_63b43708a6324a23b0001ebe8a3f7d0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfd1edf-72e8-42b5-9f84-6957794831f6/canon_650d_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb362d01-0ddb-4642-b25e-ee540f1f7d00/how_to_do_a_4_step_approach_in_volleyball.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_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 5324 bytes
SHA-256: 29f4c840bbda0c87ed4d93a03d0fb4a7b954ecffa501cb45365a0c6c1957db37
font_01_sfnt_off00010d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 11556 bytes
SHA-256: 882ded0d4f4813aea298c294fb35bacead01c48e57f6d638801ddf45261cc509

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