Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51b4624cb3352b0…

MALICIOUS

PDF

72.8 KB Created: 2021-02-27 11:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 594401abf424717fb3ad0a2e83618666 SHA-1: 0afe053f8899777a5f1f5023ef83546f6d89e27a SHA-256: b51b4624cb3352b04cd884a8e47739d757c0f154b21b9edffbbd85c9c03f237d
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://dafemum.ru/wix?keyword=zenith+zp505+remote+manual In PDF document text
    • https://cdn.sqhk.co/zubavagi/g5ieYji/79487525438.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372384/normal_5ff26257c344c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446272/normal_60034fe245dd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_601387a01ff52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456699/normal_5ffb7bff62278.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/wogunipato_sogin_nejibojato_dilekilitakis.pdfIn PDF document text
    • https://cdn.sqhk.co/panufarubel/gdQfTqs/likert_scale_6_options.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xukonakefules/customer_service_training_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/demipibulemozimebaku.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/77448992022.pdfIn PDF document text
    • http://sinamalamukin.epizy.com/t_b_bimari_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/98873320966.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/57463048575.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/cam_8_listening_test_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/gakuduluzubiminenoxinixe.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/que_es_alimentacion_enteral.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD487 5036 bytes
SHA-256: e6e60aee617ad8a6933f2c38e27becb04bb5e782607e943ca8f739449e52c181
font_01_sfnt_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 10148 bytes
SHA-256: 74d9290d4b9cd4056790943b90554e2c7b4d4896b0b381a88593a5bde5c08b13
font_02_sfnt_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.