Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52a8043976965f5…

MALICIOUS

PDF

76.6 KB Created: 2021-03-24 01:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0c8c7bb8575c95de3c6fecd3e9de90c0 SHA-1: 803a808146b8e5e1dea65a769104bdd3555d38f7 SHA-256: f52a8043976965f50e424d23c72ba87db9f27c0a8aeaea69c52167a518442de7
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-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://baarspo.ru/123?utm_term=breath+of+the+wild+dlc+1+guide PDF link annotation
    • https://cdn.sqhk.co/fovipobex/hghghgp/battle_star_latest_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/J2gibic/62828172410.pdfIn PDF document text
    • http://ogranicbio.space/curriculum_vitae_sample_format_in_nigeriacz6rv.pdfIn PDF document text
    • http://pewujok.mypressonline.com/pamiduvosovo.pdfIn PDF document text
    • http://zidujuwus.iblogger.org/among_us_for_pc.pdfIn PDF document text
    • http://mpvideo.org/jaxipirafojovabukuxiyc6jv.pdfIn PDF document text
    • http://vulifux.66ghz.com/bawara_mann_song_mayaanadhi.pdfIn PDF document text
    • http://thecet.xyz/e_myth_revisited_table_of_contentsoa7et.pdfIn PDF document text
    • http://majikok.mygamesonline.org/best_books_for_8_year_olds_india.pdfIn PDF document text
    • http://idealslimitaly.site/neonix_model_9000-1ufpms.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/77514083125gqkx0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rokidibamufoduv.epizy.com/what_does_co-prime_number_mean.pdfIn PDF document text
    • http://sanojepenot.onlinewebshop.net/python_book_for_beginners_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e028b71-534c-414d-a33f-99661b02348e/79128557020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70215266-d271-4563-b3e9-33547fad3c31/fallout_4_mods_pc_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c0bd2a-acd3-454b-b885-23042d7d5871/28807106247.pdfIn PDF document text
    • http://zujewutaze.epizy.com/minuet_and_badinerie_partitura_flauta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47805d70-cabc-488d-ba72-fde26b6b6306/mini_movie_maker_app_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44aa7761-d0ea-4c8e-bede-2c3c82fd7f8b/nutuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587d66e1-3e2b-4ff9-aa45-ca2cad980e44/how_to_reference_apa_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18740a15-4c87-4c34-9ff9-f76c7219c453/juvaxuxisodoxur.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_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 5300 bytes
SHA-256: 10be56200c93d2a994f768baa4409e515c590f5e114f2106a41ec3f0b16b8725
font_01_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 11376 bytes
SHA-256: 75ee1a66543a5ce9d37cfbf6bd28428e90253d14e43e6e9c57e75331f5223cfe

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