Malicious PDF — malware analysis report

Static analysis result for SHA-256 7048136b5dc2d355…

MALICIOUS

PDF

89.7 KB Created: 2021-09-07 21:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 50e1fc590efd52eee4e498138cce2fa1 SHA-1: b0b8c914cdae5f8c628ee0d92b1a96b77ddeabcb SHA-256: 7048136b5dc2d3559abe1456c316658b3705f6ef1e969382eda2bc25b4b88d26
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript, indicating an attempt to execute malicious code. The file also hosts a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely attempts to download and execute a second-stage payload from one of the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://weddingitaly.jp/images/file/lalelevani.pdf In PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096b62f0fc31---76619413723.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074cc049b74c---biwodafunupotulixalu.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/161137a963f6d2---80166505921.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/53555458376.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/4275f2415cb559ff802d7379a512b3b9/72715718466.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/67795118796.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161331d70abdff---luxoxikevuvadosajajalam.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbf96364872---linewiva.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/faruxez.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608be82e169e1---werusaw.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/bfcc628807bcfcd003e173dc9187b852/togopixuwofavijimew.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/7a6695945930fe437a31b2b1567d3282/turogifosejobaxepoxuno.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/opv3omlj5ih7v7kdn351ggghi1/mememuribaruvigebevazo.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ldbq1klk9e2prr51s6o9f77mhh/vuxudoxuzigatevijigojaf.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/memikaru.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/14691336139.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/cfcf70b7a01a8c0a67997e96e16654b4/65523583155.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/73426352861.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160aaea2d1ded7---kitinapagifimitijoxodut.pdfIn PDF document text
    • http://cosyromania.com/media/file/larufekikepabugivobati.pdfIn PDF document text
    • http://sireny.net/share/files/dizamesabatuxafulu.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609afc43922d8---fokinebikub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=tamil+word+meaning+in+telugu+pdfPDF 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_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001117b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117B 10824 bytes
SHA-256: 79e2ae51c11e05ef6068f5b63f1c7640c86c905305f16b55602232fcfe5853b8
font_02_sfnt_off00012a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3B 18144 bytes
SHA-256: ce5f0b67e4825d30037844dc723bf76ea16d442e52fad55f785ab464dd8b970b

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