Malicious PDF — malware analysis report

Static analysis result for SHA-256 58766858ddb144a4…

MALICIOUS

PDF

69.3 KB Created: 2021-02-12 10:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 48c4be9a4a8c98b7d93174af974bfddd SHA-1: 45dc8d896a9a14337635f6207388672b6d42e0fd SHA-256: 58766858ddb144a49a0f0baecafe4efaea0435432b3de0883938d6f1d35c99fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as a malicious PDF by multiple heuristics and an ML classifier. It contains numerous external URIs, including one pointing to 'seumenha.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded links indicate it's designed to redirect users to potentially harmful content.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/wix?keyword=quantum+number+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/gituridewo/nwDidON/sitting_room_furniture_arrangements.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fc871b74992b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_600af296c759a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_60241556239e1.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/QhfDXib/flapping_duck_bangkok_price.pdfIn PDF document text
    • https://cdn.sqhk.co/diduwuposenu/iEDEjbU/breakout_ultimate_brick_breaker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382004/normal_5ffae2504daf8.pdfIn PDF document text
    • http://interplast.ru/4581906036u0loh.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/Wiegehc/project_management_methodologies_pmi.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/didijgj/lirasufelunosaged.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/gfgd6he/mapatekenojudegaku.pdfIn PDF document text
    • http://italia-doc.space/sales_and_trading_interview_guidexrupa.pdfIn PDF document text
    • http://fitokaps.xyz/73697550904f5q4f.pdfIn PDF document text
    • http://djami.ru/selodazuvomulisupajiq0drr.pdfIn PDF document text
    • http://bbflowers.net/windows_8_pro_download_iso_64_bit_torentlulwm.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/hHld8Uv/frog_tape_painting_stripes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidakofonol.epizy.com/black_wallpaper_images_hd.pdfIn PDF document text
    • http://kubazemaxem.epizy.com/xazifa.pdfIn PDF document text
    • http://mulozeraxepe.epizy.com/96885012197.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_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 5252 bytes
SHA-256: dfcf2a8aa5d8c75c5ce00d421ccf3a4343a85b70ab6a5bec2f7b56f713798959
font_01_sfnt_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 10640 bytes
SHA-256: df5361a115b52cb5fc5ddde829b93e1dc1bdff23970af87c2781aa4025d72841

Open this report in the interactive analyzer, or submit your own file for analysis.