Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0615ac0cfae040…

MALICIOUS

PDF

72.4 KB Created: 2021-03-12 01:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fa2b4f77dd0d3ce3577939cca94a9936 SHA-1: 27d540cbacee010eaa7ff5174f0c6c1a548629c3 SHA-256: 3d0615ac0cfae040ec6ff5cff1056e503c797d69b469d65bdfc3ad53fb340d8f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'calibration of thermometer experiment'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=calibration+of+thermometer+experiment+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374857/normal_5fe18782d144a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497081/normal_6003fe4cbd5bb.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/0ojeHYV/disney_movies_newer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_600e30f72062d.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/kH0hcY9/50065418696.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5fe59645388f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_6034010ab591c.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/UOijgCh/eso_necromancer_build_pve_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393486/normal_6007a72f58c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_602e526809775.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d07d2ad9-9752-4fe6-a6d4-ac807dd4badd/37288225168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481db07a-8c90-4320-893a-7a8fd5842beb/xiwux.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/26614711505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da79fbe8-9a45-47ad-8661-55a4c7f536a5/dopidogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59f3c2b-0c05-4dc4-8d86-0ae0aad958b2/can_you_track_a_usps_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3239f8-f3ef-4753-ae33-8e751bf98ab2/1725498937.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/lilox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039e0bd8-dcc6-40d4-8ae6-8855a743e434/poulan_pro_bvm200fe_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1019f630-77d7-48e7-a3bf-cdb18279b40f/how_to_change_the_belt_on_a_dirt_devil_power_max_pet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f325735f-2165-4b57-b0fb-a7388f6deda0/vizio_2.1_sound_bar_remote_manual.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_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 5216 bytes
SHA-256: 61357302767c57d47c4b575094e811ed22a09c4955d39ae8cd3c97766716b447
font_01_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 10268 bytes
SHA-256: 8029623b72269b5565fc9c405bde787effe03df0f9b89ff1b97b6a75d3b9afee

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