Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ce0df746361371…

MALICIOUS

PDF

65.6 KB Created: 2021-02-22 14:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3b4f0bce533129a8f11a60a46f300098 SHA-1: bc2cea9eb93069dec369c059e22a275a3ebc97b9 SHA-256: 55ce0df74636137124d28d6dfe2a4e6e7946b4cd9407c0a4d68ef5a4ad948bff
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://druttle.ru/wix?keyword=david+klein+solution+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449405/normal_5ff790d071509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_6033390f3e649.pdfIn PDF document text
    • http://sebofafekorav.iblogger.org/capitulate_noun_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_60137b34c4282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476924/normal_6002a6a9a920d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_6027641c267d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5fc7caab15aaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_5fe54e7740f9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466676/normal_5fdf8c57540a5.pdfIn PDF document text
    • http://bunokegezodidur.iblogger.org/59694643028.pdfIn PDF document text
    • http://luzibis.iblogger.org/ahora_dice_ringtone.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/dazifozixawus/pofifedez.pdfIn PDF document text
    • http://lexafuz.epizy.com/tekuridibaketuwuzezad.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/free_machine_embroidery_designs_library.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/community_child_care_fund_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/why_diesel_engine_is_noisy_in_operation.pdfIn PDF document text
    • http://gagelenobom.epizy.com/64554096560.pdfIn PDF document text
    • http://jegowijuvu.epizy.com/shaman_guide_p99.pdfIn PDF document text
    • http://torumaxot.rf.gd/always_on_display_samsung_a10_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_off0000c5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EC 5212 bytes
SHA-256: 27d6a9cc57584d16ac456c4612c2fec2766deeac723d7469ff0b29473ba83e7c
font_01_sfnt_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 9872 bytes
SHA-256: 48c62556a4b5c76138d3ce0b1eccd938f55059c6bf5132ce25b1e7c95c6c416c