Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df946d2e0f2e7fd…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 22:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1045342c025e989b46b499f0bfdfb8a3 SHA-1: 545869e09c2865016a3197a7ecd7cc536e95da42 SHA-256: 3df946d2e0f2e7fd24dcebb190e596b380916263c0f758246d2a9e6698815bcc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wix?keyword=algebra+2+honors+final+exam+multiple+choice+pdf PDF link annotation
    • https://cdn.sqhk.co/tatogevi/FjmujhE/the_crown_racing_manager.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/aKIhcia/descargar_battlefield_royale_the_one.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/agcojhm/91217487747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379371/normal_5fcfa1d638e23.pdfIn PDF document text
    • https://mizavujubamu.weebly.com/uploads/1/3/0/7/130775062/1400557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_601f01c7aacd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391899/normal_5fe269cee8b37.pdfIn PDF document text
    • https://cdn.sqhk.co/zobarimumuje/6VG7Gie/13322501199.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/soOjcEu/86383526900.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/gwty2s5/gabojosato.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/2de7cfcda39b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465128/normal_6018e9fa80e49.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/Uwwihic/57922561029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/defiance_2050_weapon_mods_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/learning_english_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/louvre_museum_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/jason_voorhees_costume_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/best_top_load_washing_machine_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/86070181871.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/asus_tinker_board_os.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/aldrich_and_james_rooftops.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_off0000df04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF04 5900 bytes
SHA-256: b5598ffbae01a0ad1fc95c4dd218a9960e53e4a61910f5ccf35b2d2fe7333c67
font_01_sfnt_off0000f2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 10280 bytes
SHA-256: 301f61382a9964d907f11572c19a60d3f532c4b1847d575e504fc01e979d6f44