Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3f3844b12ccd8a…

MALICIOUS

PDF

64.4 KB Created: 2021-02-23 03:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9e1e59d3e8c541429222a240f89a2193 SHA-1: 9d0f1b77e7052f98fe24659a2629a4096abbfb79 SHA-256: 9b3f3844b12ccd8a9c0fe3398f654967bcabe3b0642c989749aa2aaa13a85e75
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://maypoin.ru/wix?keyword=wot+tournaments+3v3 PDF link annotation
    • https://cdn.sqhk.co/xokebuzizo/jcNjhgi/highway_rider_game_for_pc.pdfIn PDF document text
    • http://fb-pageunderreview.com/black_and_decker_leaf_hog_blower_vac_bv4000km4gf.pdfIn PDF document text
    • http://copyrightprivacy.site/how_to_say_new_beginning_in_hebrewb4251.pdfIn PDF document text
    • https://vilifamizebu.weebly.com/uploads/1/3/4/6/134617150/wamojukemilir_doboda_wufukijula.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/7161996.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/fonazuzixagizir/jodepoveposulibot.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/tecnologia_da_informao_logistica.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/widakizazilojokabup.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/42148896759.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/imparfait_ou_passe_compose_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/atmega32a_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/backup_viber_photos_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/conjunction_so_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/thasha_avatharam_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/7z_file_extractor.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/79540329555.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/hurricane_grill_nutrition_guide.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_off0000be35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE35 5036 bytes
SHA-256: 5bf3e7aba8a2202a56371e022bc89605dc6a79b45d166a1e848f27b0468d0899
font_01_sfnt_off0000cf4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4C 10856 bytes
SHA-256: cb9090245500efeac83e704b6756dd7234efeedce2730326cce3e11118509366