Malicious PDF — malware analysis report

Static analysis result for SHA-256 b742984c1561fe31…

MALICIOUS

PDF

82.2 KB Created: 2021-03-19 00:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b390c238973fecf35b99b0974524e220 SHA-1: 52c89505f2503d30cef79b186fbc596cc7186720 SHA-256: b742984c1561fe3188e9734e7e8b6093b24b123ab2c8d2d87913c39e7b8e2444
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of the primary URLs, http://zutadefado.epizy.com/bicentennial_man_full_movie.pdf, is associated with a large number of generated SEO links. While no scripts were directly extracted, the PDF structure and the nature of the links suggest an attempt to manipulate search engine results or direct users to potentially malicious content.

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-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://leonvi.ru/award?keyword=orthographic+to+isometric+pdf
    • https://lujukote.weebly.com/uploads/1/3/2/7/132712447/7554019.pdf
    • https://feboratopaw.weebly.com/uploads/1/3/1/3/131383734/bosenowuxofunid.pdf
    • https://xoberaditide.weebly.com/uploads/1/3/4/6/134645794/9012c1c20a58f.pdf
    • http://gavowobow.iblogger.org/polar_coordinate_grid.pdf
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/majugesusatubiboli.pdf
    • https://cdn-cms.f-static.net/uploads/4372355/normal_601f65057501b.pdf
    • https://static.s123-cdn-static.com/uploads/4476002/normal_5fe3fe551239a.pdf
    • https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/mavamekabopiz-kebat-wiromunu-fijadu.pdf
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/xubuje.pdf
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/lesekorofirop.pdf
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/pikeb-nojoxovinefi-kotemenel-zupit.pdf
    • https://dokalifuli.weebly.com/uploads/1/3/4/0/134096730/52912.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zutadefado.epizy.com/bicentennial_man_full_movie.pdf
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_df35c331be66469983b77bfb090d969b.pdf?index=true
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_e9605792cc4540c5bc8ca243ad308e30.pdf?index=true
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_038ae32fb7454885adeacb895f42e983.pdf?index=true
    • http://loturorilod.rf.gd/narolagubel.pdf
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_ee70740f7c174867b3805ff8ff2602e5.pdf?index=true
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_70cdf1b9f6c744f8970abddade89dda1.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecac.bin
9440f71eefa4f59c7a71b16fb0b9f65724f2db68f71ee41650680a98f027c4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 4032 bytes
font_01_sfnt_off0000fb1d.bin
2cb9b452fea4dfc85643ab9a3ea7cf5febf5cf19a9ec9bdef6dc86bde699f035		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1D 5564 bytes
font_02_sfnt_off00010de1.bin
ffe78af35be7bbcee29fe357f0488560cdad24a20f200b22919c47682ca6b8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE1 13208 bytes

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