Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8ed3941d026686…

MALICIOUS

PDF

65.3 KB Created: 2021-02-13 15:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6ec28214fe8909660cb57304bee08814 SHA-1: d31a66c070422d8889e6ae11681a8c01ce0c6d6c SHA-256: 4b8ed3941d026686e97e880e97c4136bcfca2e1a076b40b0cc6148b7a732a696
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://crophysi.ru/wix?keyword=aqua+magic+rv+toilet+manual In PDF document text
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/64bd659a1d51e1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fcd02f36a372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_601afcae608d9.pdfIn PDF document text
    • http://getporte.xyz/bootstrap_registration_form_with_validation_w3schoolsj9wy0.pdfIn PDF document text
    • https://mejojesakawevud.weebly.com/uploads/1/3/1/4/131438193/2980722.pdfIn PDF document text
    • https://kitivagep.weebly.com/uploads/1/3/0/7/130775950/linomedanije-bimeg-vemiwarurupama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_5fd7190d49677.pdfIn PDF document text
    • http://lejebodaz.22web.org/17391742781.pdfIn PDF document text
    • http://olivamebel.com/death_road_to_canada_hand_upgrade5iu3l.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/kovigutavixopak.pdfIn PDF document text
    • https://namekabesomi.weebly.com/uploads/1/3/4/6/134668803/c787e5298.pdfIn PDF document text
    • http://899themes-demo.ru/instagram_captions_for_selfies_in_bedh6wzb.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/57836902984zygdp.pdfIn PDF document text
    • http://medyayazilimtr.com/silent_hunter_5_mods_alles_freischaltenzr7hr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EE 5116 bytes
SHA-256: 2ca2412c7977ff43006d06f387553ff44b8e865bce8a1f7a627b6e0ef9e0c7f0
font_01_sfnt_off0000d548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD548 10376 bytes
SHA-256: aaae85f996970367b8c4a36c4eb74f7abdf26e1ce9f5a5369c662bb880955313