Malicious PDF — malware analysis report

Static analysis result for SHA-256 9354f455b2abb914…

MALICIOUS

PDF

60.6 KB Created: 2021-02-11 18:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 49ba8142f2bf375677513ee11841c962 SHA-1: 483119eee0f7ad40616315f42746d9c86ba167d6 SHA-256: 9354f455b2abb9142d80fc486407f873dcf90998130466c36b88e355f888141a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wb?keyword=svbc%20rudram-%20namakam-%20chamakam PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467915/normal_601776a574fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_5fdbe2647edca.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/jchgo0I/the_littlest_viking_movie_cast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_5fe711f555ddc.pdfIn PDF document text
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/baredejesasikan_nagopixaliro.pdfIn PDF document text
    • http://tiktokfrance.fun/432251129719pcl8.pdfIn PDF document text
    • http://netewe8.xyz/autocad_guide_book_free_downloadfwx0s.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/ahggdvu/61620027937.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/UgmjdiX/train_controller_salary.pdfIn PDF document text
    • http://tovelksa.website/bms_s63tu_m5_m6_performance_intakecakvb.pdfIn PDF document text
    • http://spoonnumberone.xyz/derwent_london_annual_reportxznhr.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/xazarujokemus/bum_simulator_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/rcog_guideline_for_pph.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/the_informer_2019_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/professional_soccer_betting_tips_apk.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_off0000b250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB250 5368 bytes
SHA-256: ff85c36c6fad2be4863f9374b4fdcbff5a7f249dbf692df530f9e4a31659e74e
font_01_sfnt_off0000c475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC475 9888 bytes
SHA-256: a8337899151faefc35c2d4c3cfb0b02db3515e0fbba2ca36abeecf9ad4e5e816