Malicious PDF — malware analysis report

Static analysis result for SHA-256 159d49a6ea946542…

MALICIOUS

PDF

69.9 KB Created: 2021-02-11 04:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f17c036648ea903a9f6438f8b43db99a SHA-1: 385f88f82910619b2c1766c1dddd91060719017a SHA-256: 159d49a6ea94654215d1851ba5ab953668a305aca9c594c0d007e86bca829ed7
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/wb?keyword=border%20around%20bootstrap%20form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_600e7943f03a3.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/jbjhghb/walking_dead_zombies_evolution.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/4jaijYb/sezutenepis.pdfIn PDF document text
    • https://nalafefig.weebly.com/uploads/1/3/1/3/131379301/7b6ea9e487.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/jYhdnha/meninozutepowosubaji.pdfIn PDF document text
    • https://besukobar.weebly.com/uploads/1/3/1/0/131069863/bavate_zilus_sovaresoli_rizafivisiz.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/9bb1e38dc.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/MgclDrF/zozinenip.pdfIn PDF document text
    • https://cdn.sqhk.co/rigowodikot/cihjixj/odd_eyed_cat_for_sale_malaysia.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/zomomimofezuzatebe.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/fBhcVia/assistant_pro_for_android_23._33_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxuziwemulogel.rf.gd/kutinagojunutibimafetine.pdfIn PDF document text
    • http://kexofiz.epizy.com/budget_performance_cars_uk.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/buscar_mi_android_gratis.pdfIn PDF document text
    • http://jaziwovapotulit.epizy.com/job_interview_question_and_answer_in_english.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_off0000d3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E8 5344 bytes
SHA-256: 91526f548d3a11b6e76e5b4deec9a9837db887d3106e01f8e13381b35f2d7ef3
font_01_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 10948 bytes
SHA-256: 2a19bd3e69d6b10b6cb177ef6d3d0fcb543e00803b296d45d3bbcc5ea559db1f