Malicious PDF — malware analysis report

Static analysis result for SHA-256 608a2d5277c3cd71…

MALICIOUS

PDF

84.9 KB Created: 2021-03-09 20:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bd8af50e5f5770ccfcde653be4c63d67 SHA-1: 5e99ce09aad9d90b80de45ed2f55d35b43e672ab SHA-256: 608a2d5277c3cd71f48d3834349d2e426510bea10309d1317f086300dfab0f6e
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 0.9997

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/strik?utm_term=schwinn+213+recumbent+bike+replacement+parts PDF link annotation
    • http://dobuwiwitevotir.sportsontheweb.net/kiwusaporoboja.pdfIn PDF document text
    • http://003-center.ru/technical_interview_questions_and_answers_for_computer_sciencex6gml.pdfIn PDF document text
    • https://lebamemodeli.weebly.com/uploads/1/3/0/7/130776101/viperaxu.pdfIn PDF document text
    • http://mestorating.ru/naxuw4hsa3.pdfIn PDF document text
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/puxeguzekaluji-nunewaduxuzilut-liwasuzifun-ritirarak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_6004db7c3eaf8.pdfIn PDF document text
    • https://dimawirosaj.weebly.com/uploads/1/3/3/9/133997296/b8f38acc9be03.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/why_is_my_printer_saying_there_is_a_paper_jam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422627/normal_5fca0b96c89e1.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/18335124115.pdfIn PDF document text
    • http://socialwave.me/voduzidusonixonegexejefiesjrc.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/4d5c9a998c4a21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7441bfb1-ce88-4b9f-9eaa-7a5e4f7fc7f3/attack_on_titan_movie_trailer_reaction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d08cc2-3c47-4992-8b0e-e2c873db4844/jutizeguzo.pdfIn PDF document text
    • http://suzifoki.myartsonline.com/marketing_digital_que_se_estudia.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/peterbilt_579_service_manual.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/xepixowulomubifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc1421f-e229-43d9-8449-9d4a904f7563/lexus_gx_460_hybrid_2020_price.pdfIn PDF document text
    • http://xenezipulugiji.atwebpages.com/aage_barati_peechey_band_baja_mp3_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7193a42-d5c3-49db-9c80-024b049b4384/54556948778.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_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 5920 bytes
SHA-256: 74892556af1a74dd50aec0a71c424762e1ee4598ca9655109166d6f8bb91b2dc
font_01_sfnt_off000122b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B8 10276 bytes
SHA-256: 109d7c265d367afc4dd0a2292c75aca45a95a25cd4bd844c581468373a884ab7

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