Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5d0d5c6a049d10…

MALICIOUS

PDF

75.4 KB Created: 2021-03-02 00:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7694a7fe793ca9d3d26bdfa04811d39e SHA-1: e9760d310e8306484127759cf0ae3cdff8712037 SHA-256: 2d5d0d5c6a049d1046d180ac3970c7d85b186550a568166621744aed1010a064
194 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially corrupted, contains text related to statistics, likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pelibifir.ru/award?keyword=what+is+the+application+of+statistics+in+real+life PDF link annotation
    • http://psylath.com/5697904124845jb4.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/the_martian_movie_download_in_hindi_hd_720p.pdfIn PDF document text
    • https://wipuzene.weebly.com/uploads/1/3/5/9/135971348/9903714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451566/normal_5fe4380ed16bc.pdfIn PDF document text
    • http://biotringel.shop/10817738753iv167.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/c7dbcc3.pdfIn PDF document text
    • http://copyrighthelpcentral.com/fanolupagudokexugijxti4f.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/futenazuxarurumagalu.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/jevof.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/tusofuziputumitepezar.pdfIn PDF document text
    • http://itsnat.space/the_north_atlantic_treaty_organization_nato_was_formed_for_the_purpose_of3fyri.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/604672.pdfIn PDF document text
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/3242374.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/5780158.pdfIn PDF document text
    • http://olx-delivery.cc/toefl_vocabulary_quiz_bookjpmd2.pdfIn PDF document text
    • http://maddot.space/maposibagoferezufivepe9p2g9.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/gamiwaxova_xidedojegutaf_bukefonagid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 5116 bytes
SHA-256: 9cb5ca4e5bbe79068cdbe32e6e6d6a2e82dc7b4f6a2e8f8c8feca38cc87bb596
font_01_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 10856 bytes
SHA-256: fef0a35cfd9ac024cb4a2fa04d562302ca0a3fb36dc20195188b944c454d7dc1

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