Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bda5f1441ed160f…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 16:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b36de2fc24c1f97ceac81b3580ff54d2 SHA-1: a55feb999cbe75e236f735cdf148a6c4083d3aef SHA-256: 4bda5f1441ed160fa2f9259f7d5a65f4fbf0dbfa9fdd1c96a3ad46418aab1680
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=are+tacos+high+in+sodium In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_602055ace97d7.pdfIn PDF document text
    • http://woxotiwewezoba.22web.org/78315106815.pdfIn PDF document text
    • http://gejejok.iblogger.org/large_format_film_cameras_for_sale.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/s2_netbox_default_login.pdfIn PDF document text
    • https://wezedamuj.weebly.com/uploads/1/3/4/4/134480618/nalumabazi.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/Ijbhb0A/pojikatodez.pdfIn PDF document text
    • https://kuxesilivalagi.weebly.com/uploads/1/3/5/9/135963561/xuvibukonote-robemifed.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/66f120.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/jdib9id/nick_hockey_stars_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_5fe7f49b8314f.pdfIn PDF document text
    • https://fegikunula.weebly.com/uploads/1/3/4/4/134482285/3852872.pdfIn PDF document text
    • https://genaxixa.weebly.com/uploads/1/3/1/4/131437685/jiterepunani.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/fejififimaketo/134633185.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/98639119173.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/tevurilegit.pdfIn PDF document text
    • http://sudimotidib.epizy.com/why_does_cuisinart_coffee_maker_leak.pdfIn PDF document text
    • http://tisimutugixaji.rf.gd/wifagelaperaletuvejonovu.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/cfo_job_description_template.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_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 5312 bytes
SHA-256: b586e728d22200497d278ada7244db63e20487368e5d37ce9b8a3b8e3b32d78e
font_01_sfnt_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 9836 bytes
SHA-256: 68cd7a283dcd3f3da0a9c6c3bdef68ea29786e8d7a88e6107709b13874b8c477

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