Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb3ca6a37d27d1f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-09 00:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 826457d5c97f4a24ee52ef1d62e9215d SHA-1: 7559f7275babe27535a4a0fc17a961806c34d169 SHA-256: 4bb3ca6a37d27d1fce13b361320841d322e0aebc3e01fabc4262915249c0a966
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing page, masquerading as an interview questions template. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=interview+questions+template+sheet
    • https://cdn.sqhk.co/wibononuve/cgcfKid/black_panther_cast_salary.pdf
    • https://cdn.sqhk.co/vameduvide/chfJige/facebook_marketplace_morristown_nj.pdf
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5fee2eec9548c.pdf
    • https://cdn.sqhk.co/kujusiru/cZfdhdV/41690930727.pdf
    • https://cdn-cms.f-static.net/uploads/4373522/normal_60207099b5c1f.pdf
    • https://cdn-cms.f-static.net/uploads/4417990/normal_603ebd62bfb0f.pdf
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5fec8e3a7d7fa.pdf
    • https://static.s123-cdn-static.com/uploads/4369487/normal_5fcbfb47b74bf.pdf
    • https://cdn.sqhk.co/buzomesil/AjibhfV/85979870890.pdf
    • https://cdn-cms.f-static.net/uploads/4376852/normal_603a254393c56.pdf
    • https://cdn.sqhk.co/bonosexov/dgeajeh/87252288939.pdf
    • https://cdn-cms.f-static.net/uploads/4459059/normal_60352777becc7.pdf
    • http://tibudirowe.mygamesonline.org/sanojomarerasapun.pdf
    • https://static.s123-cdn-static.com/uploads/4462982/normal_5ff76fc08c461.pdf
    • https://cdn-cms.f-static.net/uploads/4384155/normal_6014666f79119.pdf
    • http://pifofobexaxel.mypressonline.com/69803363710.pdf
    • https://static.s123-cdn-static.com/uploads/4474222/normal_5fe4cd66ef4da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/56b54241-80f9-4b0b-9f0e-93d094fe5d0b/33344458440.pdf
    • https://uploads.strikinglycdn.com/files/a249612a-624c-4eed-a147-bbf707721168/troubleshooting_kenmore_electric_dryer_no_heat.pdf
    • https://uploads.strikinglycdn.com/files/bb230ba2-ee3e-4090-ae86-d2b27cb7804d/rhetorical_analysis_essay_ap_language_and_composition.pdf
    • https://uploads.strikinglycdn.com/files/f0e69dd8-c0f1-4845-93a7-814458a64a74/35898402259.pdf
    • https://uploads.strikinglycdn.com/files/fcd58a4a-b9ea-444d-897e-2017ba251d5f/34001234388.pdf
    • https://uploads.strikinglycdn.com/files/a884e5e1-597d-4273-a4c6-35c01e2cd393/siwemowadefozo.pdf
    • https://uploads.strikinglycdn.com/files/7aa64033-2982-4701-8d7d-69937bcdbaf0/namisitedixadimu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc64.bin
72c3d114050f5a3ad07fb186786101b6dbc186a3916de628aafb31e4849f97c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 5276 bytes
font_01_sfnt_off00010e3c.bin
fbc08c71c2b761f7ea2b98dc13f7f65f7a48c40be9c06809551386d35cd287b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3C 10352 bytes

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