Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec973e515f6fe3e…

MALICIOUS

PDF

456.2 KB Created: 2021-03-29 01:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: be78622b3874c2e1c2d816e508ea39d3 SHA-1: 69e2f42f915c33e542aa1bfd5f55ee85358a156c SHA-256: 4ec973e515f6fe3e9d1f4355f3ec0f68eabd3526847c06f37b9b07515c37b9e1
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by a ML classifier and ClamAV, specifically flagged as a phishing trojan. The document body, though heavily obfuscated, contains text related to downloading a 'codex pdf', and the embedded URI points to a URL that also suggests a PDF download. This indicates a phishing attempt to trick users into downloading a malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9600

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/award?keyword=orks+40k+codex+pdf+download PDF link annotation
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481067/normal_5ff8968247642.pdfIn PDF document text
    • https://datipozor.weebly.com/uploads/1/3/0/8/130813945/8409120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_60496bdf2119a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fd66eb5e0f2c.pdfIn PDF document text
    • http://samyog.ru/weeping_willow_tree_pruning_guidetupwq.pdfIn PDF document text
    • http://ch-redirect.icu/sinisotoroxe56eq2.pdfIn PDF document text
    • https://texifuxifom.weebly.com/uploads/1/3/0/7/130776695/8b1333334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464315/normal_60092e8bb9715.pdfIn PDF document text
    • https://ruxebawinafa.weebly.com/uploads/1/3/0/7/130776533/gufas.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
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_50771120f04c43f6a7206c1e4b56592f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/827113ec-3dd3-430a-b795-5d5bbd345fa6/88444821391.pdfIn PDF document text
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_2aca3b4b39284a66b10ec4e5ad78f04e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/efefa111-e7c7-45fc-b4e4-49b9b64a6577/78234925246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47c19cc-3945-43d3-98aa-ee82c8701c64/how_much_do_social_care_workers_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dceb8bc1-075c-41ad-9284-6851816485d8/what_happens_if_you_fail_visual_field_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac1bfad-2fe5-4dad-aea9-7f8ca30217ed/87425181752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3b5470-615c-4276-9803-c26d52715591/vumisavasarusobonofit.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_off0006ca5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA5E 5288 bytes
SHA-256: cf180abb7f2feef7917d32dd56e36c20196cb7dcecfebf5d65d0dbc57f1324d3
font_01_sfnt_off0006dc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC82 11668 bytes
SHA-256: 48bb5bdda60f37795ff3cdb52c0424125877d6dd1e275604e015834cd3e59b33
font_02_sfnt_off000703b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703B8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.