Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b1d073ec73eb85…

MALICIOUS

PDF

75.1 KB Created: 2021-09-13 21:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 19a6883ca118a5a01ced55495102d3f0 SHA-1: aee403d84cc564c7b834da84159dc81b1f41bc27 SHA-256: 69b1d073ec73eb850820e4265c78a586f44f712d3fc58006452a50636c2c967c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The presence of numerous unknown and potentially malicious URLs supports the classification as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e61cbc8cbcf6214e787e7c0f0f582d27/bawatomabowezavunonotaz.pdf In PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/74409335066.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/lamoxekewenulew.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0d20b2bd5---fotunelezodilogenaxobunu.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/71391633532.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/q02ve6acki8uma51egs0d8itlm/pubakurofitug.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/7pefmc231r02fjrh4kcm4ao8e2/bolefoluder.pdfIn PDF document text
    • https://wmu24.ru/media/file/ketajonipo.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/tegabesugimedeneti.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-3/20210903195137512731.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109050542201443.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/duziporos.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d9d608bbf---nuxunebogiwogabanofofav.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/zaliforanajonovoxakifete.pdfIn PDF document text
    • http://djpress.pl/Image/files/tuxetikelujikomoluxe.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/petidukebovakubotitox.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/74303863336.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/gadavevadanegadixiwofeda.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/79941965060.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/0485794b39e29cea3d8d866d1e833bee/1028967796.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/sanekebezusapoga.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/86104680253.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/87019549470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=aladdin+free+streamPDF 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_off0000c1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AF 10376 bytes
SHA-256: 6c56dfbf24f1aa0de1126c42399e94f3bc5e07f793e5862d369527a4c0b2a574
font_01_sfnt_off0000d90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90F 17648 bytes
SHA-256: e82b95f878f04dca0f530cc875fb2c6362ecd63aafd451f3de19515051672d52
font_02_sfnt_off0001071e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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