Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e47cb88fc8c295…

MALICIOUS

PDF

84.8 KB Created: 2021-05-02 02:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 55ac34988b1d722aae6cd87302d1aa1f SHA-1: 766d8ad2cb37b60bf2c094f74a28d368403dcadb SHA-256: f2e47cb88fc8c2952702d8c2001084367ed995b65f7d32285a1cc0b5b5d8df28
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 0.9985

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://jumiwimov.ru/strik?utm_term=soundarya+lahari+pdf+telugu PDF link annotation
    • https://jafovoguna.weebly.com/uploads/1/3/4/0/134096268/8b5fcf9f3cd.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/antimicrobial_agents_review.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/wijekexoj.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/nmkjcij/pufopogisudepizeka.pdfIn PDF document text
    • http://dazavaluk.mygamesonline.org/xewusatekarazilimiledeso.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/Ijh7jbs/scanner_app_for_documents_and_photos.pdfIn PDF document text
    • https://radokixudex.weebly.com/uploads/1/3/5/3/135342076/1220433.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5fcaf7eb95913.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/jgLjc8b/car_racing_games_download_for_pc_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382004/normal_5fc5bf2d6f171.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/jh5oGge/70580580930.pdfIn PDF document text
    • https://nakabupibuf.weebly.com/uploads/1/3/4/6/134608610/0e9eeb1ba671.pdfIn PDF document text
    • https://cdn.sqhk.co/titubebojek/nlichcg/minecraft_java_edition_code.pdfIn PDF document text
    • https://gojefofowuf.weebly.com/uploads/1/3/4/5/134596001/jinonabar-govela-batobajasopulo-liwudofe.pdfIn PDF document text
    • https://zusonuxegaza.weebly.com/uploads/1/3/1/4/131437774/47e4d79f0e4df.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/gotekefopizogon.pdfIn PDF document text
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/redanonaxusagezod.pdfIn PDF document text
    • https://wiguvizokon.weebly.com/uploads/1/3/0/7/130776253/5430705.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fee807d-7b8e-4596-8478-212a967e1dd1/36675941397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79304238-f0cf-4926-9553-bb51d445b18d/moduzugematewabefajol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ba305b-6fbc-499a-b75d-7526feac6355/sears_oven_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a597089-c186-45a7-a8ef-0c927d5b6559/how_to_change_last_name_legally_in_ontario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60c6be8-3e2e-432a-8f92-d385097af120/how_much_is_a_yellowfin_tuna_worth_per_pound.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 5328 bytes
SHA-256: 3e5ad26fb809e2f31b43782945f3469eaa0484996aa2f2e52fbaafbe0db0dcbd
font_01_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 9152 bytes
SHA-256: 345e0b661d71af51a033a3a6a5394cba8af30a29e69b5c3a595e7a9c7d43c449
font_02_sfnt_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 10696 bytes
SHA-256: db15255275525f2cb0b4af43ff2ec4432a22c1a2a41b20b3562f3f600c4e9526
font_03_sfnt_off0001301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301D 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8