Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a69ca560f7c6a5…

MALICIOUS

PDF

63.2 KB Created: 2021-02-14 23:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cb34e2d9e3900192aaa17ec1ab2e05c2 SHA-1: 950a57a761584a2a138aeda60821c6a0bd944e4d SHA-256: 13a69ca560f7c6a57025e69b0d2338583b19b99e2a54a35441753f82307cbac7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=avery+5+tabs+dividers+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491433/normal_5fcf87cb51a52.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/eExljdy/bird_live_wallpaper_with_sound.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_5fd2429cd983c.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/cgePjbb/21773499898.pdfIn PDF document text
    • http://thesimplycompleteseries.com/nts_answer_key_2019_lumhsylbda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5fe3022e5c6f6.pdfIn PDF document text
    • https://cdn.sqhk.co/kojariwirip/POjiheE/twitter_follower_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/bFmighT/american_color_labs_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/ghchjji/when_i_go_don_t_cry_for_me.pdfIn PDF document text
    • http://usecabinets.xyz/grid_drawing_worksheets_symmetryi0peg.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/00ede95a54fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_600b0078676e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_600c9f49578f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485714/normal_5fde906f3badf.pdfIn PDF document text
    • https://cdn.sqhk.co/zexupibo/geUojid/tibanatoz.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_off0000b73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73C 5520 bytes
SHA-256: a80575ca8ace184641d1fbc89d5753f540737659604f7f7435d8142ab79bd64b
font_01_sfnt_off0000c9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FA 10840 bytes
SHA-256: 2c7d3a63dd59ceab84a8d171f3e8a332641198629992d5f3cd4714fc1bc5ba39