Malicious PDF — malware analysis report

Static analysis result for SHA-256 982ccdfc99ad3ee4…

MALICIOUS

PDF

93.1 KB Created: 2021-09-23 19:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 25a88c7daeb93e898bfaa7b0fbf277a2 SHA-1: 868ce4c715f4c1fd78c5c4380638ce88d3315483 SHA-256: 982ccdfc99ad3ee4e3980722343d234e4165735346ca135d897459953a8212e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://coretry.ru/uplcv?utm_term=harry+potter+book+6+pdf PDF link annotation
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/vuvizenoximorajasupamavuz.pdfIn PDF document text
    • https://www.dtd.com.pk/ckfinder/userfiles/files/xupijojijagiwubilapuz.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/lexuwuxezimoju.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090422213673499.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/17447911825.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/xofumabowozowiworugire.pdfIn PDF document text
    • https://questyme.com/userfiles/file/10352011747.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/23237685171.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/2427ea250ab04f3d0d124682b08c6167/69619532256.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/etemdii8k54dtapsulu1dffaj1/mibeselukufezeja.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/15874025739.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/joxulelutefekakotajug.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/xosizuxejokodunokusol.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/12400730837.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/jifevorotulibulupawe.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/bodojinuluzatubide.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/87558210051.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/buzikafilisuxexoxegugejif.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/rusudigimawofamavam.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/lokowanudunitiw.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/meburokaxenul.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/popozepulizi.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/maporilefekewawes.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001057e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057E 10584 bytes
SHA-256: 56fae58c844fb2a58e3ed347cee9f9c60d55fa0bf34788687d3033acece200a9
font_01_sfnt_off00011d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B0 19148 bytes
SHA-256: 881ae3753d1490e6f98f2814a6a120eb77b71136eabc469a00ba5f259415f580