Malicious PDF — malware analysis report

Static analysis result for SHA-256 c321c2acc858b8f1…

MALICIOUS

PDF

70.3 KB Created: 2021-02-23 16:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a99150c022410e36b9bde778c82c4b0a SHA-1: 6e1836186c237a415df492d4cbf8570e41ffc4ad SHA-256: c321c2acc858b8f10c8a502a4c35f0bd8e06e377b17d154f061fbaf6daa8c2fd
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a URL designed to look like a search result. This URL is likely used to redirect the user to a phishing site or to download a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://jottigo.ru/strik?utm_term=how+to+run+java+program+in+windows+10+using+command+prompt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488323/normal_60075fe46f817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fe1f79b88f5c.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/iiIjhPW/32158548229.pdfIn PDF document text
    • http://gnoogle.site/lippincott_pharmacologyy2ofy.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/egjCtjg/83360705969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5fe4d7aed5b95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_600551641b3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_6014e7a6de752.pdfIn PDF document text
    • http://safetymirrors.xyz/psp_3_emulator_for_pcwken2.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/jaLj38K/97283456336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_602d4065b270c.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/gN6qUuW/gipifevof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407724/normal_5fe8bbd07fa00.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/f66Dhdd/ultimate_car_driving_simulator_apk_premium_unlocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384822/normal_5ff1b3ef23306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/xikugifonoj.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_off0000d1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DB 5744 bytes
SHA-256: b69a969ea878979ed9c34e30857da51ccaa4c17cd5e75181060f389781ccb3b3
font_01_sfnt_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 11320 bytes
SHA-256: 953801f2c354574fc700ce7ed579272a76038b68a639108bc0561ca6ddd2eb50

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