Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ede4a4d78997d21…

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 03:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 856c7c9fe05f03594f98a71638c23dff SHA-1: 67a5fe3b738f37a6731fc8ce4d8ce18e218ec1d3 SHA-256: 7ede4a4d78997d216fefe931445516fc5a968795c587fbd8f2d037b78664a4c1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. No scripts were extracted, but the presence of multiple external URIs and the overall structure indicate a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://armenia4d.com/contents//files/tonadanekemilewurolepinab.pdf In PDF document text
    • https://12tiga.com/contents//files/10214961861.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/32074927076.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/32e99c57a8b30eb65c0350d6d6fcaee4/44003072912.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-07-25/images/files/zabewanenujimexizubej.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/nefowixawevekubusakuxo.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161031140d06fb---duxabowo.pdfIn PDF document text
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/vubujaniwod.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/xomabuwimemizom.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/39089325292.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee51311df72---voreniwererufejidivul.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/gutipekunibefaxaz.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726819df434---45369518964.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab764dd0f1c---fuxug.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0af14fb0ea5ddf63a0757f34ba9c49cd/81163070296.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/88905359698.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/kenuwove.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/ziwivo.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/jajapekaxumimovotasutiler.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/14803519525.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/jusogazoxisodekimijuw.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/86881413848.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/cbbf841b2a06f68b3728eee1108b6c6a/salatif.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/vifikiriwutovowovolutezi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=adding+mixed+fractions+with+different+denominatorsPDF 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_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 11044 bytes
SHA-256: b5116b308f2625e91bad12f6c7d2ece5668b2a94402ddb34a01b774435eaebc2
font_01_sfnt_off000103a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB5 17456 bytes
SHA-256: 0065f55ebeff4015ab4817ed35d032d46e0d7d8cc8ca612de636e0432d3ad6d6

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