Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4fd8ab12787167…

MALICIOUS

PDF

74.1 KB Created: 2021-03-14 14:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9a755d4dba2f60aa9f99d4daedc0c86 SHA-1: 9df5634b5352fb2d8a5c5563e396299b94912910 SHA-256: 0e4fd8ab127871673d99f30de3680e7ef5cafe9e45fdf7278e1dad97df5d9086
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique commonly used in SEO link farms to manipulate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery via the embedded URLs. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/wix?keyword=duty+to+god+pdf
    • https://mupezoki.weebly.com/uploads/1/3/0/7/130739180/4b3f21f.pdf
    • https://cdn-cms.f-static.net/uploads/4487894/normal_603e459addc99.pdf
    • http://nowuzoti.iblogger.org/63613797392.pdf
    • https://jodutofafedabaf.weebly.com/uploads/1/3/1/4/131452959/9112069.pdf
    • https://mefutugotipefij.weebly.com/uploads/1/3/5/3/135304762/roxiseputulor.pdf
    • http://kefets.xyz/download_wwr_world_of_warfare_robots_mod_apkd1b8t.pdf
    • https://static.s123-cdn-static.com/uploads/4455174/normal_5fdec7532f6d2.pdf
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/vimavo-gilaruwatomibig-fadonopelovemow.pdf
    • https://xoburorabusu.weebly.com/uploads/1/3/0/7/130738623/9286377.pdf
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/1417647.pdf
    • https://zatikavetix.weebly.com/uploads/1/3/2/3/132303242/2075205.pdf
    • http://izzzaaa.space/20189752511upuxw.pdf
    • https://voluwunuzusiju.weebly.com/uploads/1/3/1/4/131452861/netutewugigi.pdf
    • https://static.s123-cdn-static.com/uploads/4380858/normal_6001c748d561c.pdf
    • http://kukufimivote.iblogger.org/is_barrons_sat_harder.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuxipuretox.rf.gd/57516629137.pdf
    • http://tosivasode.epizy.com/13090760505.pdf
    • http://votitagupen.epizy.com/magnetic_field_worksheet.pdf
    • http://xuxirifuv.rf.gd/78451540640.pdf
    • http://kupavojos.epizy.com/como_hacer_estudio_de_familia_numerosa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e2.bin
80e9d8c6f790ce61f39e7df817da605e6e25d4b6160007806eca6aa18e96d356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 4792 bytes
font_01_sfnt_off0000f75f.bin
a3b62c8cfafc44147c05834d67b1b4a8c57057abf5bd2841c6aee34d6ed226c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 10628 bytes

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