Malicious PDF — malware analysis report

Static analysis result for SHA-256 d777e87c51a8957b…

MALICIOUS

PDF

74.3 KB Created: 2021-03-06 06:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 51e7352f51a40b199574605878f1ec4a SHA-1: f443b7db625ed6360ba82d3b466710309264ae64 SHA-256: d777e87c51a8957bb1358d0903e3b33c73cff03de37e30af32c96a9089143936
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The embedded URLs suggest an attempt to direct users to potentially harmful content, masquerading as legitimate resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=uncharted+drake%2527s+fortune+strategy+guide+pdf In PDF document text
    • http://vowufijetapiko.sportsontheweb.net/similarities_between_impressionism_and_expressionism_art.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456135/normal_6005e2ec80c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_5ff8ab6088da8.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/80402571087.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/giihseA/midivi.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/jjihgc6/73156900816.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/ap_microeconomics_workbook_answers.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/creative_aspects_of_filmmaking.pdfIn PDF document text
    • https://ponivigaxuk.weebly.com/uploads/1/3/5/3/135313456/nabipiguwul_digalivetomaw.pdfIn PDF document text
    • https://vutajavegev.weebly.com/uploads/1/3/4/0/134040502/nopafenu-kegoravazer.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/5165154.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/FNBOxig/escaping_the_prison_henry_stickmin_collection.pdfIn PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/5967a4a838.pdfIn PDF document text
    • https://bamiwesuwo.weebly.com/uploads/1/3/5/3/135390748/wuboganufogezew_pipegidel_rexusitames_kozun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_603d48c0a57a0.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/marimejerebo/lavefatexo.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/fimigixokibatexa.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/zuxexodip.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/60138966686.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/moultrie_mcg-13034_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/12086970007.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/yearly_calendar_excel_template.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_off0000e4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F8 5576 bytes
SHA-256: 1915bc7329c75a48c4d3392aebc1e2c397d207738e47dd9fabc0eb91f299eeda
font_01_sfnt_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 10444 bytes
SHA-256: 54e16c3775d090ee691274c3908c64387d1ac90de66d077e0a5c01c9366c18db

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