Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0709dd588efe7b7…

MALICIOUS

PDF

103.0 KB Created: 2021-03-14 04:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: df026733d3f39a32019ee380bd2b6e8d SHA-1: f5ca404b219cf7315a4bd0ea744c86afa56e550b SHA-256: d0709dd588efe7b74a13ed834c8d7c465bf8858bfdf85cbb174445eb7b78b000
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL and numerous other extracted URLs suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it likely attempts to redirect the user to a malicious site, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=audiobooks+free+trial PDF link annotation
    • http://lexidubug.22web.org/vuzelidagelopajubozu.pdfIn PDF document text
    • http://nowijito.22web.org/semusenewavimanajawuduviw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_603ce3949e66d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fca78cfbf2ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_601308423145d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387241/normal_5ff7ca7d0f4a3.pdfIn PDF document text
    • http://hamlikjorettoop.ru/51846716686sjy6e.pdfIn PDF document text
    • http://domsale.xyz/troy_bilt_super_bronco_riding_mower_air_filter9kknp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_600ea27813456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494440/normal_6034058e88425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fee40e20d92f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409092/normal_5fc5fff2063bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_6005852e3e197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_5fe68bb22d5b0.pdfIn PDF document text
    • http://blablablacar.online/nisigunajajivisujadapupefe8nro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501996/normal_5ff3b330ecf9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sunivope.rf.gd/weather_report_manitouwadge_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/mekoxekidi.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/90493081798.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/checkerboard_game_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/best_flight_simulator_for_android_2016.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F0 4872 bytes
SHA-256: ed46160d72dcb8b3cc095a3ab6aed1c85837c8d395d9eac1ce8931e3c9b9b21b
font_01_sfnt_off0001588a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1588A 11880 bytes
SHA-256: ad4bbb52d9062e77c05694cd6db2cb4a965a36fd6e5f966caa02f81e6ac9cda4
font_02_sfnt_off0001809d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1809D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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