Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09203ca418f7bc0…

MALICIOUS

PDF

119.2 KB Created: 2021-03-10 11:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c234e2413f7b1344b5ab48017d343088 SHA-1: 87c08b89d4626c429c9ecb10bab1705ecbf0f612 SHA-256: f09203ca418f7bc06dd2df34dcc06fc40342c4e74380e8286bc6cea1ad9f3f2d
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste content into a shell, a common technique for executing malicious code. While no scripts were directly extracted, the PDF structure and numerous external links, including those on disposable hosting, point towards a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ponafet.ru/award?keyword=adn+polymerase+pdf PDF link annotation
    • https://cdn.sqhk.co/ragejeli/ghg1wih/minecraft_prop_hunt_map_gmod.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/la_crosse_technology_atomic_clock_setting.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/2HDjgsa/27828425284.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/gjNhdr2/kawasoxokobamibodo.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/b565ce06f9.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/jdtTeu1/3440272511.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/iggVhfp/gipolisodesum.pdfIn PDF document text
    • https://cdn.sqhk.co/xufuwejaxe/chbEs7Y/cambridge_dictionary_book.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/what_are_the_most_common_catholic_prayers.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/entrepreneur_magazine.pdfIn PDF document text
    • https://jalidinetuvumun.weebly.com/uploads/1/3/5/3/135333814/b892b19793609.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/udi_u818a_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/cjjnjbU/likifuvuxusamajutab.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/if2iahf/jailbreak_prison_escape_maps_for_mcpe.pdfIn PDF document text
    • http://detozube.scienceontheweb.net/jotomutufidomisatorafa.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/momegas_fububodizor_forexux.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/ySLYhiL/studio_code_frozen_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/3ggjaqO/shop_disney_parks_pandora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_4cfe7d1679a04a949925f8b6ef6e0946.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a623fa34-2f67-4a29-aba5-0bd3d3798927/the_shining_book_quotes_page_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815359d3-de8d-4d78-917a-35c1f5a7464a/2004_dodge_ram_1500_5.7_hemi_engine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22ad04d-c373-4f9b-89a2-9a12267d9746/21753191216.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_e7e9f8ac36754d519e18ea2b068ece03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/443c21ac-5917-4493-b571-e2c7df8be4f3/over_the_rainbow_ukulele_sheet_music.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_4c9377d92e1d4e39985616b6198973de.pdf?index=trueIn PDF document text
    • https://c9ecad83-e70d-4e71-84d8-0086c45344aa.filesusr.com/ugd/01a317_56f3e8107c154c33b97c607f95cdf302.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17815 5276 bytes
SHA-256: 7b88d4c41ebc0b0d5420886c51c194c382e12b52d1a1bac6905432d7c507f738
font_01_sfnt_off000189f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189F9 14756 bytes
SHA-256: f9fd539211faa82d614a67fbffc243163ccf9872f45d21fe6db60e4c9eeeb7eb
font_02_sfnt_off0001b9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9FE 16100 bytes
SHA-256: dfdc6983d3c42b81f9741fa6cdceaab3e97c1fbda00e6274acf933e6ff911e94

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