Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc8243ae752dddd…

MALICIOUS

PDF

77.0 KB Created: 2021-02-15 04:06:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0d21752d223ad39abc4c1bcbb8092007 SHA-1: c2f6a2365ef0954673ffba43105d04f4933d0b53 SHA-256: efc8243ae752ddddbacd81b4b1f04b753e3bdca018683e1f251aadfe0c3ecd7a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=liberty+tax+net+profit+from+business+worksheet PDF link annotation
    • http://dorightpress.com/outbreak_prime_quest_steps1p0cl.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/Chgbij1/74824150937.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/HifqWhd/flying_chicken_pa-_dak.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/J0jjdm2/kojumil.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/ctgeM8g/75393712408.pdfIn PDF document text
    • http://all-host.site/837748021760mez9.pdfIn PDF document text
    • http://kindraretterath.com/mudixovuxaregidodebanedoxcb7g3.pdfIn PDF document text
    • http://ag-management.space/78165177693j5x6t.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/sjggdgc/new_york_tourist_bus_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5fec7344cea91.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/deXV6bm/enemy_strike_hack_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478402/normal_5feddf44e873f.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/muvarelo/verinenavav.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/jixobuketemefexepoguboxur.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/crs_individual_self_certification_form_hsbc_uk.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_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 5516 bytes
SHA-256: 2d23aaaec172fe664b8c33cc5a3c1a23c5cb8f01d7cce843ed193ff17e400c13
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 10476 bytes
SHA-256: 655de7dc5adfba4c60a62df906cd7537b0a887af98715001685bc9a9c0fd3621