Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a1b01607aa5a7b…

MALICIOUS

PDF

73.1 KB Created: 2021-02-09 06:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b1526413ab39556f42a03f03563b2827 SHA-1: ced6efc1e6aa5a7f9a0834da6afbff75c8c9e68e SHA-256: a4a1b01607aa5a7b82c5115797f15808e06fd10ce2f91acbb36162d0b17483db
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/wb?keyword=centos%206%20init.%20d%20script%20template PDF link annotation
    • http://rollernefritmassage.xyz/sling_tv_arabic_customer_service_phone_numberv0ome.pdfIn PDF document text
    • http://igrarazuma.info/rucoy_online_hack_androidqhn9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5ff1bb178dad4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500883/normal_5fed189e914d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5ffbe55a4c6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_60186180e378f.pdfIn PDF document text
    • http://gelchlen.fun/98185190863i70i3.pdfIn PDF document text
    • http://arm-watch1.club/653494470732usg9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409250/normal_600fa1a6b390f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_5fe796e82559d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_601e40b4a62d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480595/normal_5fe33a8b82a09.pdfIn PDF document text
    • https://tapoduxumusuna.weebly.com/uploads/1/3/4/7/134733142/lejoxapinapuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_601362bb0e30d.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/muvojugejoxip/75964565664.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/pokemon_white_2_rom_coolrom.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/tujivugasanimafazu.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/fbi_fingerprint_card_template.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_off0000de38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE38 5308 bytes
SHA-256: 8c7093a20507e4abadbcaf6367967bc31fa3d3773712f9744f52fe22637b9910
font_01_sfnt_off0000f02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02F 11424 bytes
SHA-256: 52591efedef25fc517b521c6990ccac7ad2fb0f2ad3333f3dbac11922a569711