Malicious PDF — malware analysis report

Static analysis result for SHA-256 abec2baa4c39e934…

MALICIOUS

PDF

72.3 KB Created: 2021-02-13 19:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b6e28defce4e32488017d70f4d1436cb SHA-1: d92891f680b9bec2298646948a47d34a22114361 SHA-256: abec2baa4c39e934d302637444126104a4a70bd915392c13f7f463a4dee3701d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded external URL that likely serves as a lure or a download source for further malicious content. The PDF structure and embedded URI heuristic indicate an attempt to direct the user to a suspicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jacksth.ru/wix?keyword=medical+medium+cleanse+to+heal+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5ffc1d03798f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478688/normal_5fc704c356bf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383695/normal_5fe0e6b8e2d2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5fcd8626a3ac9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_60134eead0b88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_5fe17aae115cb.pdfIn PDF document text
    • http://blacklaser.ru/yowhatsapp_mod_ios0gezx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merizipu.rf.gd/observation_vs_inference_worksheet.pdfIn PDF document text
    • http://jufofokisib.epizy.com/93288282169.pdfIn PDF document text
    • http://vedirananu.epizy.com/laredojuz.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/below_is_more_information.pdfIn PDF document text
    • http://doroxokile.epizy.com/nuxotewokiginovokuvugiga.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/boot_camp_support_software_windows_10.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6F 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 5492 bytes
SHA-256: 031c39af005556f2bbdc30f1a4a59ac474acb5a4637b62bb609a69c5bdd37217
font_02_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 10540 bytes
SHA-256: 36bb5001b9226c06062a62a600f34ec0d2fa17b1f56f4d4bfd0c616cf3159d3e

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