Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5a61c254482dc3…

MALICIOUS

PDF

79.9 KB Created: 2021-03-20 17:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b8ff935e0a05c9d95159132bd080d372 SHA-1: 146c0f08fa9c34f37380846abc8348aa4ceaf80c SHA-256: ed5a61c254482dc35c14cf0958403f1d2ed0b02a1b0894aab85e518005f8a246
126 Risk Score

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 0.9998

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://jottigo.ru/wix?keyword=piano+studios+and+showcase PDF link annotation
    • http://usacreditmonitoring.info/puxigisizaridelixo0jd0k.pdfIn PDF document text
    • http://katermore.ru/478945513628o7my.pdfIn PDF document text
    • https://joxegozul.weebly.com/uploads/1/3/1/0/131070165/tegaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/ifjj7ge/91865445641.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/dOif5B4/digikala_magic_keyboard.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/vujolevopadesem.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/hghjgfy/bisalejewipejuwifaxuxedak.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/how_to_change_time_on_onn_clock_radio.pdfIn PDF document text
    • https://boleturem.weebly.com/uploads/1/3/4/3/134398498/6142d39b73.pdfIn PDF document text
    • http://cryogen.me/zewakegunibm5akt.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/eifBhjp/wheel_size_bike_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/kibukumivu/SickOE0/javascript_cheat_sheet_2018.pdfIn PDF document text
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/6631524.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fadupazageraf/o_que__uma_distribuio_uniforme.pdfIn PDF document text
    • https://aa4a64a1-c69a-4176-9ab9-82648dcabbba.filesusr.com/ugd/70701b_a22141bad7f04a72a0ae6d0bf5c724b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/template_letter_requesting_donations_for_event.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_6c87328ecb614744b95630389f94e6f3.pdf?index=trueIn PDF document text
    • http://xijewixevav.onlinewebshop.net/aleister_crowley_book_of_lies.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_f0f2d05a47604e69a0e3b29ce923a37e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 4872 bytes
SHA-256: 974ab11355a7f94e2f17c6e968d4ced906e0ec05effa74ec7b6bec9b3562f58f
font_01_sfnt_off0000fd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 12072 bytes
SHA-256: ccde18c85d908419989919e050fc36ace96fc144abf92224cecc1c76e3969518
font_02_sfnt_off000124ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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