Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd52a5aacf5a52a7…

MALICIOUS

PDF

66.0 KB Created: 2021-02-13 03:37:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d28d58a3edfec5f52db5fd319c8a44de SHA-1: 3c3239b772b2193d2bb972a00c86ed86865bd9cd SHA-256: cd52a5aacf5a52a7bffa55d4f00ddc3c731ec64b7ca1062e12fa9496a8196d9e
184 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
  • 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/wix?keyword=glory+of+the+icecrown+raider+25+guide In PDF document text
    • http://gufutaca6.xyz/641368082937uuy6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5fda4a8f7acdc.pdfIn PDF document text
    • http://excschool.ru/79120030158ftu35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_60251ee66163c.pdfIn PDF document text
    • http://ludugomawetus.22web.org/biquad_filter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488580/normal_6008cf81ba706.pdfIn PDF document text
    • http://zipogagu.iblogger.org/42938142294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5fc7496532818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_60225ff70cc1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_5ff28d2901b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_60214a0854c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_5fe901287f4f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolutiso.epizy.com/ecommerce_business_plan_template_free.pdfIn PDF document text
    • http://xevemifura.rf.gd/black_amoled_edge_wallpapers.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_off0000c496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC496 5588 bytes
SHA-256: 02063b2105b488582dbe52ba9a5553f03799e13c6dceea708a99f513f5d6a001
font_01_sfnt_off0000d7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BE 10420 bytes
SHA-256: 1644b1f114811fed2ed8b500ab5dd91f8faa4392886626df95bc64f70bcf3e7b