Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a76caac4f8b8d1…

MALICIOUS

PDF

72.9 KB Created: 2021-03-02 23:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d5253f940270cd8db4cba1725bec7799 SHA-1: 67ef52925b42c277744810e3cb61b9f3ce637ae1 SHA-256: d9a76caac4f8b8d1ba48ea777790cd7c6c1c4f40959d9b54e32135dab0d88443
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=arc+welder+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375705/normal_600208eb39979.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/5995658.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/how_to_hard_reset_a_samsung_tablet_10.1.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/patigitikerimesaso.pdfIn PDF document text
    • http://reduslim-officialsite.site/massey_ferguson_135_loader_specslkkjx.pdfIn PDF document text
    • https://waliruwixogipi.weebly.com/uploads/1/3/4/0/134016871/8d91d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455670/normal_5fd71a70a0bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_603a725fe9b72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470699/normal_5ffdd3ce59235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_60362e3c9425f.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/gateme/christian_ethics_case_study_examples.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/pandoc_convert_latex_to.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/metformina_850_mg_efectos_secundarios.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/nibukejogi.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/marbury_vs_madison.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/godspeed_frank_ocean_sheet_music.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_off0000e337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE337 5036 bytes
SHA-256: 2147922d56f2b03bd6fe096d5a8aa57a8b9ae0050bd2bf133c18c08888ae7f39
font_01_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 10112 bytes
SHA-256: 1edc7887d5a7e252dbfeda0db5329d040c4e1820f0968ed1594a847226d6280f