Malicious PDF — malware analysis report

Static analysis result for SHA-256 f311ea8e5e7cb06d…

MALICIOUS

PDF

87.3 KB Created: 2021-03-20 17:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf7e7588f985c083a9f60080188740bf SHA-1: 99b81958d2e7bd9f8cdcf534b299331f7a5aac45 SHA-256: f311ea8e5e7cb06ddd22152ad48185778ffdf7d24a2abe5ae8a33865c40dde1c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to suspicious domains, indicating a link farm or redirection scheme. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=james+baldwin+the+evidence+of+things+not+seen+pdf
    • http://parkji5x.xyz/wilefes33h.pdf
    • https://vixoketos.weebly.com/uploads/1/3/1/4/131453026/gilufilegasafom-puriden-nababadunan.pdf
    • https://bebujufexuxiki.weebly.com/uploads/1/3/4/6/134624407/lojovugilenu.pdf
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/2737981.pdf
    • https://jebowevut.weebly.com/uploads/1/3/4/4/134493782/e242273b19.pdf
    • http://goodxday.xyz/gutawoxitef8b0hh.pdf
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/xozefevegogal.pdf
    • https://janafapaxe.weebly.com/uploads/1/3/1/6/131606835/tagugaloxebotaz-zazewogowuwafaj-sudizutar-fuduzoliruza.pdf
    • https://xikofekukinakij.weebly.com/uploads/1/3/2/6/132681309/ff8902bf21b133.pdf
    • https://wedidosav.weebly.com/uploads/1/3/1/6/131637371/229431.pdf
    • https://zuvaxufar.weebly.com/uploads/1/3/5/9/135993026/2548991.pdf
    • http://cetapp.xyz/kuwadaxunodusnwd84.pdf
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/3b853.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b31072d5-15d9-4780-ac80-dccdcf961d69/26528578965.pdf
    • https://uploads.strikinglycdn.com/files/3757dddb-c01e-49ce-800e-a6b4677b27d4/xuxomatejewusu.pdf
    • https://uploads.strikinglycdn.com/files/5d8c9b89-1a95-48eb-aeb6-f78722eb8f76/bunewe.pdf
    • https://uploads.strikinglycdn.com/files/f7d33745-f02d-4897-ad39-2e4e36d4d342/xitapifunafolawixetikoja.pdf
    • https://uploads.strikinglycdn.com/files/b8cb7e92-dca9-4775-aea8-35b755841cee/is_mayonnaise_a_low_fodmap_food.pdf
    • https://uploads.strikinglycdn.com/files/8ad2a780-0bdc-44fb-afad-57f8663f4a95/jevagijabilokotinepejufuv.pdf
    • https://uploads.strikinglycdn.com/files/4455d83f-1394-488d-9dac-04ca0a8ce3d5/86806447200.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_off000113a5.bin
1c3022a269445d0470adb86cbc63819df8ef56d7394a86cd997d2945f2125e1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A5 5752 bytes
font_01_sfnt_off00012736.bin
f9c5df583735b054fae528321becd95bfa1b94498e7439081feb45f3e652813d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12736 11360 bytes

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