Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8d5f1fea09ad73…

MALICIOUS

PDF

79.2 KB Created: 2021-03-11 00:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2c1f2975a9a56e983632af7f5a4d46b5 SHA-1: 9625b5dea86f5b611dc47d2301f8f6c8f7a6ef0e SHA-256: df8d5f1fea09ad73a5979f591dd04bfdb85ee5f4508b6b3cd37399f1003185d6
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic confirm the document's purpose is to host or link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=it+chapter+two+drive+mp4 PDF link annotation
    • https://cdn.sqhk.co/gisatajofo/wNEDha0/nizebunogidamajunamad.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/haQnigZ/maxasejivawukadilit.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/hbNiagf/roadside_attractions_map_idaho.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_60103f76c3823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_6015e7d0bbc83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/rifolukuzofalixit.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/swimming_pool_maintenance_guide_book.pdfIn PDF document text
    • http://mufifofoge.epizy.com/fowosenozekemoxipajaged.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/cgst_amendment_act_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/189b456f-81be-4fef-b0c8-71dca2cc8f63/muxelugebebidasomakozuge.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_4cfc03bdaa2f4dc9b1826013ae615307.pdf?index=trueIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_16992e8cd8fa4e468bd500d13ab2d88f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zedudo/titunijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60991220-e32b-4596-95a9-1d82e6f74a72/94106286303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e855bb-1431-44df-8822-4fd5f052e550/pioneer_sx_780_manual.pdfIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_616e5c3788bd4f18b88eb9ae4d84791a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12fe404-4484-47e0-ab6e-3ea9e888eae9/husqvarna_hu675awd_price.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/battlefield_bad_company_2_apk_data_mod.pdfIn PDF document text
    • http://karatufi.epizy.com/material_design_template_psd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a282af-ef85-4eac-9d3c-c97e5796d718/19934580003.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_off0000e51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 5280 bytes
SHA-256: 98223ad7c33345689ffe37405442197d84dcaab37bb1408e4786a4818fed7723
font_01_sfnt_off0000f706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 10240 bytes
SHA-256: b88980567056af146dac7da93a24258ec6f9d8e99fbae1698dee052e5d81b058
font_02_sfnt_off00011a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A68 16112 bytes
SHA-256: 055dd542a75b41b8c12c294075aad027c1d82da78fa3869ad2cdf6bcc3138586

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