Malicious PDF — malware analysis report

Static analysis result for SHA-256 883a71fc5257ecd5…

MALICIOUS

PDF

77.1 KB Created: 2021-03-02 05:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c7d665a2828ab0b4fc053d827cb03c34 SHA-1: 35a5bdf488d64b471ab28aa17e38ee4601197d43 SHA-256: 883a71fc5257ecd5dd3ac96f3ebbe302256261e272f541754fba528b92956bf0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=more+scary+stories+to+tell+in+the+dark+audiobook In PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/bible_quiz_questions_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/TZgfV4B/real_racing_3_apk_obb_rexdl.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/38296842186.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/ib1iahc/nedugidozezepegigevawo.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/o_alquimista_paulo_coelho_audiolivro.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/xovajukoxin/tifenevonoxemufo.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/1996935019.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/whatsapp_watusi_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/86511755071.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/guided_reading_activity_infancy_and_childhood_answers.pdfIn PDF document text
    • http://duvodix.myartsonline.com/96825443568.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/dance_with_my_father.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/pubugit.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/template_cv_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/legends_tomorrow_episode_guide.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_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 5340 bytes
SHA-256: 182d6fc02540c19de895b34e730d9b24faca1ecefead1fa0b3d010c9dea1d27b
font_01_sfnt_off0000ff03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 12164 bytes
SHA-256: c3167d6c97167f9208cc5295dcf8f8062b4ded9d6285d586108eb64b5a1a3bc3