Malicious PDF — malware analysis report

Static analysis result for SHA-256 844e40f977a86ea0…

MALICIOUS

PDF

71.9 KB Created: 2021-02-23 07:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f680a58635f5e93844e06b070b7feae6 SHA-1: f32e0605eb619b6e9d1cde9abe06de15c9351fd6 SHA-256: 844e40f977a86ea08ff0f31e6d974ded4bed7343f4b0609d846ad35730607dd8
136 Risk Score

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
  • 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://jottigo.ru/wix?keyword=haynes+auto+repair+manual+online+free PDF link annotation
    • https://cdn.sqhk.co/setawigiz/rjeij3i/bottle_shoot_game_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/kunagukojoxu/zjahb3L/the_galaxy_survivor_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413707/normal_5fe52e61ad40b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_6020c0de80c82.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/YqfMAid/fosusobules.pdfIn PDF document text
    • http://jumbochecker.com/fire_and_ice_movie_gifirkvw.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/W6gjcgf/bubble_level_tool_home_depot.pdfIn PDF document text
    • http://cmbclientes.com/emiway_bantai_machayenge_video_song5y1kp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481397/normal_5fe4b87abe880.pdfIn PDF document text
    • http://coloradocustomelectric.com/kovupisiravkvzgb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5fc59792a7284.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/83DwiFh/uae_exchange_online_chat.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/ixgDky2/android_lock_screen_password_types.pdfIn PDF document text
    • http://outputqwvk.space/how_to_compare_continuous_and_categorical_datac0rip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5feb6c726c8ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000defb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 5112 bytes
SHA-256: d1307140a8fec6258a31a6595c690ef8ff9ee3dd936fb75589362140d2404a53
font_01_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 10104 bytes
SHA-256: 6c30c84e6a3590bf98c6c25e19858ff4f1a005c55e8ba908bdd475797fe7de14