Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43b16b35730965a…

MALICIOUS

PDF

70.6 KB Created: 2020-11-09 18:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: fca9ccaf973abd68ac9ef1d225b0350b SHA-1: 2e7dee29eb7d4233bdc8c13a6ce5d3d1b8c2458d SHA-256: c43b16b35730965ac20f166dcd45772a112db3c99d76d3fcb67d0e2656f0f1b6
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://traffking.ru/123?keyword=bbc+movies+netflix In PDF document text
    • https://molipexizeji.weebly.com/uploads/1/3/4/6/134693273/a34e7aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8c0f4bd240d.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/6857609.pdfIn PDF document text
    • https://begaraga.weebly.com/uploads/1/3/4/6/134652864/18972575deac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f892fbea2ddd.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/tibanepoxilibud/online_learning_management_system.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/zexivap.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/animal_food_chain_in_taiga_biome.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/fiscal_policy_in_india_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/whirlpool_washer_wtw5000dw1_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/easeus_license_code_keygen.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/cylindrical_equal_area_projection.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/nabivilavudugere.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/what_is_the_definition_of_bandwidth_ccna.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_off0000cb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB80 4828 bytes
SHA-256: 5a04989feb1ab01320cdf3b58a2fb3d46dfbec937b38ff4e102f794c32758a19
font_01_sfnt_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 10412 bytes
SHA-256: bec0ea0dfef7011f3929fc67306ba20c3c4f5b223c6d9a1db3bfe5577a1ad1ec
font_02_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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