Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4da8529e734c458…

MALICIOUS

PDF

78.4 KB Created: 2021-02-21 14:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6da6bac344a05c6d67850d6c917d6a54 SHA-1: 96f373acb839f9d18d6fc45e3ed3165457126c39 SHA-256: e4da8529e734c458d204be116f6791c8410123f56293dca0861015dda6646a1e
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=how+to+use+udp+protocol PDF link annotation
    • https://cdn.sqhk.co/xezafube/cCjjhI4/pizinuvumorupizikuso.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/gcH2Yja/ice_cream_flavors_zodiac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_601a6a4bab180.pdfIn PDF document text
    • http://freud.icu/fezosisupufuwoq9czq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_5fdbc4623a951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_5ff145e09e4d1.pdfIn PDF document text
    • http://titanof-filtr.ru/watch_pride_and_prejudice_free_online_2005haah9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_601d958189f71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475728/normal_5ff31b09c64fb.pdfIn PDF document text
    • http://ryduslim.website/peter_rabbit_miffy_s_adventures_big_and_smallvszkc.pdfIn PDF document text
    • http://art-practice.org/pirufirafobegasawukolusia5nts.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/kalanejaxutilif/characteristics_of_living_organisms_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/best_cordless_phone_answering_machine_combo.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/mamufalawaguzavitazakegib.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/16909687919.pdfIn PDF document text
    • http://zesositug.epizy.com/60645078705.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/jesoki.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/identifying_fallacies_worksheet.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_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 4908 bytes
SHA-256: 6d073cd57bd005c17f0a1c3107db8e88d1103dcccea1c78e97e5e54c682ec9be
font_01_sfnt_off000106a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A9 11160 bytes
SHA-256: 3f823cd35af47578ea3033f532f07b87c575101984da1f36e2145560c7a841fc