Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14a7f05670bcbab…

MALICIOUS

PDF

73.2 KB Created: 2021-03-10 06:26:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b0a13e99ba208e4d41f4b59acccc92f7 SHA-1: 5c53982fc678c71983cbff88bacb871a42e052ad SHA-256: f14a7f05670bcbabcc44e1da36a3911ba32c5f8ff082c5fbe01d9b22fd08ccdd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://nipisod.ru/123?utm_term=malice+mizer+beast+of+blood PDF link annotation
    • https://cdn.sqhk.co/tiviluluje/ggjeSij/77463004883.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/vhahdjC/ledusavosulirezog.pdfIn PDF document text
    • http://trysol.xyz/dogagaretimof38g7n.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/gcFagfl/dojuxagepubodew.pdfIn PDF document text
    • http://deemonatrafik.xyz/the_4_disciplines_of_execution_book_summaryiq1yx.pdfIn PDF document text
    • http://all-gopro.com/95258052784g6ikj.pdfIn PDF document text
    • http://nuxidokugaleme.iblogger.org/25412185242.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/chf9Igj/std_10_maths_navneet_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/jbibrFP/hearts_emoji_copy_and_paste.pdfIn PDF document text
    • http://reduslim-shop.website/432637887756y58g.pdfIn PDF document text
    • http://wildboost.club/unlock_icloud_activation_lock_freekhg33.pdfIn PDF document text
    • http://getegenufiduso.66ghz.com/infinix_note_8_price_in_nigeria_2021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seladetitogar.epizy.com/bhagwa_rang_song_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34167ac5-a25d-4772-9cd6-403714691254/when_did_christianity_spread_in_rome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c86000-3e87-497b-a02d-24f763f184d4/20_kw_kohler_generator_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ce12b8-0784-45a1-b55b-0a58209fcfc0/97988466969.pdfIn PDF document text
    • http://rakemexovujepez.epizy.com/king_size_bed_sheets_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d561d530-3e95-42e2-9955-6a08338497be/how_does_gdp_affect_the_standard_of_living_in_turkey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e96c5e2-8f3c-4a1b-bce3-31e2f41f8f02/dawadugevobojut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c88a0e-02a9-40b2-a08b-aedd015b514e/automotive_wiring_and_electrical_systems_tony_candela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc4d342-58f4-4ff9-a21a-4b1b1b395a7e/17628751593.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BB 4452 bytes
SHA-256: 48100f83553304c90a6e270e12e5720fa3275c5bbefeca2b361d049eee2ff612
font_01_sfnt_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 5364 bytes
SHA-256: e4146fc629c3e79499d3dd7e83268eaa887d93c276c0cddf09cec647999e3425
font_02_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 10460 bytes
SHA-256: 9199e7a21a3c654fd8783ac6d2776fe9987c45434f0f9dee7098087c6893ce55

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