Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76d51d8fd3c3a11…

MALICIOUS

PDF

828.7 KB Created: 2021-03-18 04:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4fd52ed85f2d20db3add571c221882a1 SHA-1: c5bffad94b4ce76f7d787778830a897391d6ddce SHA-256: a76d51d8fd3c3a11e4e396492f5ecc51c54b05e1c595012d7fde6c7f9c21f5b4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of malicious URLs suggests the document is designed to redirect users to a compromised site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/123?utm_term=rer+rental+equipment+rate+guide In PDF document text
    • http://paxawujaxoda.22web.org/babokorik.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/80366571695.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/freud_libro_la_interpretacion_de_los_sueos.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/kuzigifalojo.pdfIn PDF document text
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/logotikavo.pdfIn PDF document text
    • http://stylecurtains.com/mosuxudwzx0.pdfIn PDF document text
    • https://darefosal.weebly.com/uploads/1/3/4/6/134601331/zovapawupolemu.pdfIn PDF document text
    • https://vatifogogunubit.weebly.com/uploads/1/3/4/7/134725392/8118945.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/91581240783.pdfIn PDF document text
    • http://hookup154.site/aging_report_in_excel_example8et00.pdfIn PDF document text
    • https://wuwawumakilur.weebly.com/uploads/1/3/4/8/134875279/dovotixamez.pdfIn PDF document text
    • https://bogagabav.weebly.com/uploads/1/3/5/3/135305267/pexupisix-komigubofu-mupij-sarokapada.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/lirijexa.pdfIn PDF document text
    • https://bujovuve.weebly.com/uploads/1/3/0/7/130738596/a147c.pdfIn PDF document text
    • http://evatopshop.xyz/ap_polycet_2020_notificationj25wr.pdfIn PDF document text
    • https://xevekarisugi.weebly.com/uploads/1/3/4/6/134697334/8572630.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fowimifefezujo.myartsonline.com/widusujapejetemitesede.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/41690647863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6ecf40-b6bf-4df0-9e04-22c1450dd5aa/what_is_social_constructionist_epistemology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd2b2ad-5d59-47d0-b6f1-ee841835449a/18411662440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa6fdca-1dc1-40a7-875c-be550d1957e8/51460102483.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000ca4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4BC 5236 bytes
SHA-256: 572ae018dc2d9d0b777bc49686b3ea35a3ae3f08e05d30e8c54ffc285b060b14
font_01_sfnt_off000cb671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB671 14544 bytes
SHA-256: 4a96d46c85cfa733bf55718abc6c7f6ed9307af78050a07b7a68b386ab06c3df

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