Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc32f05b3516cc8…

MALICIOUS

PDF

78.1 KB Created: 2021-05-03 22:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 221ea28696eee7facb279d3436efcaed SHA-1: 1861ec1a333c50a392c1b1dc21ece33f546a0824 SHA-256: 7dc32f05b3516cc8016bbd54244944519ee485cee60db5a64cb3a73a25bbb11d
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-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://seumenha.ru/strik?utm_term=3.5+phb+2+pdf PDF link annotation
    • http://dusosax.66ghz.com/66422175007.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/gELtsge/zevetabavorapudi.pdfIn PDF document text
    • https://cdn.sqhk.co/giripiponi/hhBfajj/tiny_farm_unlock_turtle_island.pdfIn PDF document text
    • https://cdn.sqhk.co/jaselavujuwi/fkp2Xij/80779890821.pdfIn PDF document text
    • http://nunejabu.scienceontheweb.net/66110683761.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/manual_del_palero_palo_mayombefno5t.pdfIn PDF document text
    • http://haustova.com/photo_editor_effects_free_download_for_pcirkjl.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/turijifovovadusekar.pdfIn PDF document text
    • https://cdn.sqhk.co/dosovejozeb/jgifjhQ/66334034125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gobusef.rf.gd/gladiator_beast_deck_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8145cbe-f95f-4146-82e2-d0c4d5c81648/what_breakfast_items_are_gluten_free_at_mcdonalds.pdfIn PDF document text
    • http://zifelibuvofaz.epizy.com/12229237262.pdfIn PDF document text
    • http://bonizeza.epizy.com/how_to_use_oracal_631_vinyl.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_d899d4b80bee40daaee41db08d8d5e23.pdf?index=trueIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_290439ae47d44ae48e883c7793afe2b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d8282e-41d3-4853-adec-49f602fb9d75/moon_river_andy_williams_vinyl.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_422f31cce27a495b95f426a379154720.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e3624e-bcc0-4dc3-8a41-e567b8378e20/free_diablo_2_cd_keys_that_work_on_battlenet.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_c2d62362099e4eba93c4905cc7e193ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68e1806-8cff-4a60-b309-a24147c0642d/davifukoval.pdfIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_e662fa86f7a54e6f82aac563a44a3c57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a05770-57ef-4020-a25d-168e471d73f3/povit.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_off0000f7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C6 5112 bytes
SHA-256: 36c0a2988219c74b7dfc71fc2e3c7a4b8a54361c4efbe429292a267e2da8b80a
font_01_sfnt_off00010933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10933 9852 bytes
SHA-256: d2e5cfb92ae90ec666f39107ae627ad200432d9e89d7a9582cd25689be6417ea

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