Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a0e53710f8ff32…

MALICIOUS

PDF

68.2 KB Created: 2021-02-26 17:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 19ffefe39dd9e400123fd6cf790a1632 SHA-1: f2a4b40b8a3c87f9f3970d4c7469596eae9a17ee SHA-256: 31a0e53710f8ff32d126a5b7d928a8c7201428b01fd5b06223f0701a0abbaaad
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://dugedepap.ru/wix?keyword=life+span+development+santrock+17th+edition+pdf+free PDF link annotation
    • https://cdn.sqhk.co/mogizufofuj/ig69dNq/zara_jeans_review_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388274/normal_5fcca13929498.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/jjifhgI/73759716031.pdfIn PDF document text
    • http://experiment.website/169977179240yt52.pdfIn PDF document text
    • http://proita.fun/22878137853hr6sl.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/egiXsgc/ww2_battle_simulator_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477138/normal_5ff32b6746622.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/xokuvewixujezanogoge.pdfIn PDF document text
    • http://itrom.fun/red_cross_first_aid_training_online_free97q49.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/d8haVhh/sii_ic_dictionary_sl-_lt3.pdfIn PDF document text
    • https://zumugerajezu.weebly.com/uploads/1/3/1/1/131163828/mazadabel-linubirazu-samegusepago-nutogasere.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/ggeieie/faduwubuja.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/heijgdf/jumpstart_kindergarten_reading_part_3.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/jhWgfhj/1493961349.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/FnSghhf/teacher_life_apple_svg.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_off0000ce53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE53 5592 bytes
SHA-256: 7b96c472a90a5ecf324200460aa50bbb1c4d58d3da7ef0b33d7544020f9675c9
font_01_sfnt_off0000e149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE149 10004 bytes
SHA-256: 26a46530132808d3bd289361efb617009ddb54f72306856dbc42242c5d14d661