Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad731f5c0806a1c…

MALICIOUS

PDF

71.5 KB Created: 2021-02-20 19:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 16cb3f0376ef50160b8fc40ffb7e3d8e SHA-1: 188806c8cb0f6ce77a9ace51f395994bb63ac578 SHA-256: 9ad731f5c0806a1c5f84be71e180fd9c13394db400921adcb36bcc6d25bd8c3c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+to+work+out+exchange+rates PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5ff23fc047ce2.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/haLIHwD/543030474.pdfIn PDF document text
    • https://cdn.sqhk.co/xezufulozuwo/wcjfnhh/restaurant_renovation_tv_show.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469837/normal_5ff86133d0281.pdfIn PDF document text
    • http://adanakebap.org/transition_words_in_paragraphs_exercisesavkjn.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/hVieFid/85653947550.pdfIn PDF document text
    • http://hotita.space/52696532461nt47h.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/hgif3if/crane_game_toreba_2d.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/jiiilgc/final_fantasy_16_ps5_date_de_sortie.pdfIn PDF document text
    • http://expo-kit.ru/robert_henderson_courts_of_heaven_download9gpl6.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/simujix/fozuwaxusogibalakobazinuf.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/menatonegel.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/wivasikamokinoguronalat.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/lose_yourself_instrumental.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/english_synonym_and_antonym_dictionary.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_off0000dafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFB 5212 bytes
SHA-256: c784aa70e6f7b98d5475e4a267472da06b5e163abcd8d7524d0e7472e23a7737
font_01_sfnt_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 10736 bytes
SHA-256: 9d49ef91e11d0f71a39a7ef80f173e85bec6f388a31790ab089e7cdbb1fa0043