Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e0caf3e387c209…

MALICIOUS

PDF

82.4 KB Created: 2021-09-21 19:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dad2d6ae3cb9aa11dfa3dba9200312e5 SHA-1: 6d90d537def5b4d2d7b759dc688935053d189c26 SHA-256: e4e0caf3e387c2094ebae3950f8ff95b95b9446c774018a18d4c8538842c457f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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 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.
  • 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 http://mientrungland.net/uploads/image/files/59107803136.pdf In PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/74569231833.pdfIn PDF document text
    • http://klinok-saintp.ru/files/jolugorulikisova.pdfIn PDF document text
    • http://giaphatmed.com/upload/file/72709788317.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1de8083be---xusukip.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/tudufisomezikelekelato.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/zavotatetugijesa.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/xosixezuxu.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/jariwuxesedupeked.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/54036316164.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/33149972747.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/20919148010.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/zureroduniweda.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/vibilezedixiduwazoxebitev.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/57962433568.pdfIn PDF document text
    • https://bselink.com/userfiles/file/64704113736.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/mixiw.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382b46c59d4---51703678360.pdfIn PDF document text
    • http://helices-evra.com/userfiles/file/maliwoxujuzenuzizofurudi.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/86358691693.pdfIn PDF document text
    • http://firegallery.ru/img/upload/masozazun.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/kodikosamadu.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/13944139754.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/vibilerepidafezivilujab.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/pakipovizenapozewobatajif.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/dojagavaxivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=deep+romantic+shayariPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C8 10708 bytes
SHA-256: 164343df7f3459b00a849507fd5db6a32d25c1fece84d6875a479c224930b3b0
font_01_sfnt_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF251 19940 bytes
SHA-256: 5b585d2ad97c451938baaf7ea1784378b106dbf3202ab3e7c8ac8bf4c53a40f0
font_03_sfnt_off00012562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12562 16232 bytes
SHA-256: e06ebeaa2bb94d9bf14337b0794fec2c9c4a66e30291689b6f6234bfe360c8a5