Malicious PDF — malware analysis report

Static analysis result for SHA-256 304e1ef9e778035d…

MALICIOUS

PDF

68.7 KB Created: 2021-10-03 23:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01efc1d6a6ddd3a41ba66d2a6dde51e7 SHA-1: 5c4056dd19c3e46748399a8e7f7bb0a27a27e534 SHA-256: 304e1ef9e778035d075406be573eba4f8a998319357037f4e77357e01b9eeca4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded JavaScript stream and external URI suggest an attempt to exploit vulnerabilities or redirect the user to malicious content. The heuristic 'SE_CALLBACK_LURE' strongly indicates the document's purpose is to trick the user into calling a fraudulent phone number, likely for a tech-support scam or billing fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.bmo-agencement.fr/ckfinder/userfiles/files/batigurodaxide.pdf In PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16154367af414c---werolavun.pdfIn PDF document text
    • http://zzquansu.cn/d/files/jomexuburuduk.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/34313194383.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e5f7e07e1---31157635192.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/bomofupuvavogosurujef.pdfIn PDF document text
    • http://elfast.ru/userfiles/file/45506332367.pdfIn PDF document text
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/kiwapodomakozafebidoxaxom.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/71209162509.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/gosobu.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/16182850543.pdfIn PDF document text
    • https://inarsindbari.org/uploads/saxevopoda.pdfIn PDF document text
    • http://mfcpavpos.ru/file/7408510600.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/lomenigama.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/765789852.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/76130774967.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/56616882861.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/diregufatanupolasopub.pdfIn PDF document text
    • http://beta-rc.com/upload/files/91395475154.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/zizosuf.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/85002957018.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/bakobunu.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/jaxiwuridusujus.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/jutotasalepobawuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=no+content+meaningPDF 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_off0000ae99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B0 10236 bytes
SHA-256: 31a4740155e252f679b7619feec9cf7e7c4139a81672215ed70012d02fe25d42
font_02_sfnt_off0000dda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA9 15516 bytes
SHA-256: 390a9eab3522a39f67a35d2622ae1b1ab541b6d5b09cf664c07a67471b6eaaa7

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