Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0342e6b11154b9a…

MALICIOUS

PDF

91.5 KB Created: 2021-09-17 10:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2562b98aaf33648458ea5283fa2d5901 SHA-1: 14b9257dc7b95adf0e0e3a12c01042912312b689 SHA-256: d0342e6b11154b9a92901aa0eb1a60eaef230dc877e3fddc9d06415146fa88e0
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable domains or compromised WordPress sites, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://candientushinko.com/images/file/16455344885.pdf In PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436c92e15ed---63279520766.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/gixofoguvazujibofimog.pdfIn PDF document text
    • http://ge-mak.com/files/lutujukowosipizagedununo.pdfIn PDF document text
    • http://esistore.com/userfiles/file/88286768408.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/73346227170.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/91021381114.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/44344272459.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/54452683532.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/63030424082.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613813f2b1fa2---gabadisotok.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/valek.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/wunabagekabebebegidopapo.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/pafibafiga.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/siroresafazuga.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b5b335ab1---40500120248.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/57097243787.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/54842167089.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/79905963301.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/4097026873.pdfIn PDF document text
    • https://nexapos.com/upload/files/gepobuboxexix.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/84148511067.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=mp4mania+movies+2020PDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/67978784690.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_off000103a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 17228 bytes
SHA-256: 4e6ecbe85584c859088a17af0dbe1657d4717df775a92ff022ea5f99052af11a
font_01_sfnt_off00013064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001487b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487B 10548 bytes
SHA-256: b72abfeadb8a3bf4cc1c434fc7a9e842420e1d0309b5d9f7b4b86d337b9965bd

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