Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7a2c79bfeffe53…

MALICIOUS

PDF

72.9 KB Created: 2021-02-17 23:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1121bf5bdceb93732586abbb55988200 SHA-1: a5ba6d45ffd4f4a348a3cefd235910266e873275 SHA-256: 3a7a2c79bfeffe5350540cdcef9b6efab3b49afc7b123dbf9d0ea4670d8e5d57
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=word+says+selection+is+locked PDF link annotation
    • http://inostrana.com/operations_director_salary_uk_constructionvdwrc.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/26hvdgc/monster_chef_spirit_stone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5fe178c9d4be9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5ff905cd85497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_6024ce03c6f29.pdfIn PDF document text
    • http://santaparker.store/tiludemovaxuyelmy.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/igf7fjc/barbie_dreamhouse_adventures_espanol.pdfIn PDF document text
    • http://odemebayisitrafik.com/exponential_logarithmic_functions_quiz_review_guidezfdj0.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/jfTFhce/taxizodakedexaz.pdfIn PDF document text
    • http://autoupgrade.website/4577028220vqoun.pdfIn PDF document text
    • http://yesstore.pro/aprender_ruso_gratistibjf.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/vonutavekip/41605530800.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/whatsapp_gb_2019_atualizado_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/xoxobu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/sciatica_exercises_for_piriformis_syndrome_video.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_off0000e362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE362 5112 bytes
SHA-256: c75e7177e88867117b77d6fe62d53d5424020e1bf533cd046f1397bd1340bd5b
font_01_sfnt_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 9916 bytes
SHA-256: a5af8f49eaca0401e949cc117cb172adedc981780e6dc3d678763c9fc1753b29