Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb490bfbd7a20a8…

MALICIOUS

PDF

69.8 KB Created: 2021-02-18 11:51:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 94add93beb0e026f08afa31fa16246fd SHA-1: 0ba8e3359393e9a700cc0184e7451d86fc245236 SHA-256: 8bb490bfbd7a20a88f77ef9b1e037fbe71fb1157956360ef05dfb2ba5289665f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to drive traffic to a network of linked pages, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=how+to+read+tarot+for+money PDF link annotation
    • http://phtech.site/12235493825vsq19.pdfIn PDF document text
    • http://karoxekixixaz.22web.org/dalet_sa_annual_report.pdfIn PDF document text
    • http://eroganoficial.site/jegedefkg42.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/c9314d4.pdfIn PDF document text
    • https://jebasiju.weebly.com/uploads/1/3/1/3/131381450/3524244.pdfIn PDF document text
    • http://xusakarezexalu.iblogger.org/attack_on_titan_tactics_apk_mod.pdfIn PDF document text
    • http://jumbochecker.com/videohive_wedding_invitations_packc5inu.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/debozun.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/sivanira/jigabolurezu.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/basketball_hoop_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/61154236024.pdfIn PDF document text
    • http://fepujivorer.epizy.com/electrolux_group_annual_report_2015.pdfIn PDF document text
    • http://vukigopi.rf.gd/wutasevavewoxuwimapit.pdfIn PDF document text
    • http://vubukenod.rf.gd/kasijufabuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/centos_6._6_kernel.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/nidugalovo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56B 4996 bytes
SHA-256: bc49874ad49feb865224b4796f863e6920bdfb063c97aea4b2fdfcb1bbaf45f0
font_01_sfnt_off0000e66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66A 10688 bytes
SHA-256: 9607db43fc021e8090ef78d6acd0ef39104cd40270b7b46dcb6ff1cc7957bc6e

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