Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5f77824ea1d4e5…

MALICIOUS

PDF

101.7 KB Created: 2021-02-19 15:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b45f9df427a2853064c0165d359bdc3d SHA-1: e8fe74da3dd0e7b11ca59cda16531341ac82dcce SHA-256: 7b5f77824ea1d4e598883cc5ba7ee3e3f075d9cad38ab507ab1c22b53695cee9
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for malicious redirector links and a machine learning classifier. The embedded URLs, such as 'https://yafferge.ru/strik?utm_term=what+is+the+book+guns+germs+and+steel+about', are designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text that appears to be a lure related to a book title, further supporting a phishing or redirection attack pattern.

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/strik?utm_term=what+is+the+book+guns+germs+and+steel+about In PDF document text
    • https://wodikaludesavoz.weebly.com/uploads/1/3/1/4/131453455/d889d3478.pdfIn PDF document text
    • https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/bagolupa-nunusegorarapam-pegiza.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/temufiremafebakosarufoklwrom.pdfIn PDF document text
    • http://cparta.moscow/dictionar_tiganesc3iukr.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/7gfjbDK/66482202278.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/fj0lfaG/55777827363.pdfIn PDF document text
    • http://life-news.tech/manovugevurorigomhdm.pdfIn PDF document text
    • http://zoomita.space/myocardial_infarction_pathophysiologym4tzu.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/ccna_3_chapter_1_questions_and_answers.pdfIn PDF document text
    • https://jofudetazowus.weebly.com/uploads/1/3/1/6/131606688/lebidude_nivir.pdfIn PDF document text
    • http://myyshooop224.site/rumevumipikukhpduw.pdfIn PDF document text
    • http://lefavapexusa.iblogger.org/38097554509.pdfIn PDF document text
    • http://iglivesupportteam.com/994659522588mqoc.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/dQfjcIQ/2314140062.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/6884067.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/e29321b504e9641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fujuresaw.epizy.com/what_restaurants_serve_brussel_sprouts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14357 5336 bytes
SHA-256: c2496790555f2b5310dc399fe87e83020906a44890f16898fbe7458bd8c8d04b
font_01_sfnt_off0001554c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1554C 11072 bytes
SHA-256: 187c430a91e7afc0acde3037a8c27e393e632511547ab278aeba3da50cde3d24
font_02_sfnt_off00017b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B1A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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