Malicious PDF — malware analysis report

Static analysis result for SHA-256 47052e7d8684ba23…

MALICIOUS

PDF

101.7 KB Created: 2021-09-14 01:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e1dfe9209e6e47eb1a17eb4603281f04 SHA-1: 83ad1cd3cc0d3275145b6496e3b56e8cbf56ded3 SHA-256: 47052e7d8684ba23b52c75b20495238fa52618a5d7fbc64276a9fe6240f1a1cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The document body is unreadable, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cattaneoarchitetti.it/userfiles/files/luzugi.pdf In PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/lumubexafamijepokomapu.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/15760889560.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385e0c651b3---retimizojirujefokifawekur.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/raxetaziliselunudigi.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/xasiguset.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/derunesiw.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/91812043963.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/66519245305.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f83e387082---41905537471.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/17744093560.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/98138032064.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/mufazatarezinuwogenaxav.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138908f15d90---besebetiwisejovuzeg.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/bupabopeloxadobe.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc4d67f67e---fexofotisejubasolomukuzan.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/komajopudalodize.pdfIn PDF document text
    • http://hasyo.net/files/file/45523235928.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/10559448186.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/8000503276.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/vuxaga.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/takekelug.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/58777166551.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/kamodavonijide.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090522225986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sword+art+online+war+of+underworld+part+2+episode+listPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFC 22800 bytes
SHA-256: d391556481a3980f5d63c150c66802e2063fa3ee9e70e1a8d64d2b425a915cab
font_01_sfnt_off0001573b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1573B 10872 bytes
SHA-256: 9f298404d36e0b891635672de33e7c35a93edb057689e81cc30567974b197e59
font_02_sfnt_off0001708f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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