Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2f38a792b3d96b…

MALICIOUS

PDF

82.4 KB Created: 2021-05-28 18:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 02ce251af422d56c413d8d315bb01f77 SHA-1: 1d06b1195b1f101b9017a7e1222a30b205e837c8 SHA-256: 8d2f38a792b3d96bee72ac5cf6ce72839d07ab4b40405fc784673942d2a33d8f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=call+name+location+tracker+apk PDF link annotation
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/pokajoserep-juloju.pdfIn PDF document text
    • https://pekubitox.weebly.com/uploads/1/3/4/4/134477952/5682755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413969/normal_606c7ccf6c296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_6067a425cfc86.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/viravarisij-nilojeri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_600e89335e923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490244/normal_605ace38e9a0e.pdfIn PDF document text
    • https://nonefipuxope.weebly.com/uploads/1/3/4/4/134493331/a599f3a9bde46d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459623/normal_6051e322655f0.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/7534392.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/6834665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470683/normal_5ffc86c14ad9f.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/f174a819a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420617/normal_60377a9bd68a6.pdfIn PDF document text
    • https://fupakukenig.weebly.com/uploads/1/3/4/2/134234610/rejigasipumanenusomu.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/6879872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414352/normal_5ff5cf6a19a70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_605af7355dff4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36ee73de-2391-4b72-b74e-2685969491a8/gegufuvesufopakisigegejeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b6e58e-19a7-4a0b-bfb2-1bd8da5055a7/sony_smart_tv_apps_disappeared_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182c56ee-cb6f-4fb7-9b08-eeccdd4e5567/plantronics_backbeat_pro_5100_hard_reset.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 4872 bytes
SHA-256: 056b588e600924eb652e3b32af007042539ff4bc6b2fc26e11bdfebb6f1381d1
font_01_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 11164 bytes
SHA-256: cc5d97434aa13f48cd673a003bb1b2d6602c4055da15741f3d3ccc47c2704087
font_02_sfnt_off000126f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F1 16132 bytes
SHA-256: 4f6d6443d667672870c38ce4e1d364e29e61a0df6fd2d8217a47270b9fff04c9