Malicious PDF — malware analysis report

Static analysis result for SHA-256 f944559cfcc5fcc9…

MALICIOUS

PDF

66.6 KB Created: 2021-03-08 23:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ea19ad077409109fc6c360c31f610fbf SHA-1: 242c9745feb5e8b7a2f9ac852900efc5cb5c34d7 SHA-256: f944559cfcc5fcc95307213db311328130c1cb8cf67a60cb18dc703afbfaabd0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier assigned a high probability of maliciousness. It contains an embedded URL, https://midufefew.ru/wix?keyword=supra+mayro+kratt+scratch, which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI and the high risk score indicate a phishing or malware distribution attempt.

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://midufefew.ru/wix?keyword=supra+mayro+kratt+scratch PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5ff88b3f1a6c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415326/normal_60003a8ae8537.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/alvSIJ9/fall_toddler_boy_clothes.pdfIn PDF document text
    • https://cdn.sqhk.co/bomikiwolug/jffhfZK/cpr_and_first_aid_certification_logan_utah.pdfIn PDF document text
    • http://bridgecommerce.com/205278004471a91c.pdfIn PDF document text
    • http://50offstore.pro/naguduxijusalorezesiys5ws.pdfIn PDF document text
    • http://hightrade.club/heart_of_algebra_practice_problemsv4jyz.pdfIn PDF document text
    • http://am-sound.ru/xomaxokaiffpf.pdfIn PDF document text
    • http://vereffka.xyz/performance_review_during_covid_examples1qf62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475376/normal_603e83dab5629.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/dowesitobuga/nhs_trust_business_case_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/vicks_starry_night_cool_mist_humidifier_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f413528f-e828-49c3-a4f1-444f3d0b3000/keroxijalonuvabofizekat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88b16e6-144b-43aa-808a-fbfb145ef505/easy_and_quick_indian_vegetarian_recipes_for_lunch.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/romiduwirulosaliwumepise.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/chromebook_11_g4_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/church_administration_and_management.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/dusix.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_off0000ca9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9E 5408 bytes
SHA-256: 41787084efc38bad6e2e1de64707198f5422707ad9146e7d3a6846caefe19360
font_01_sfnt_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 9432 bytes
SHA-256: 3a25d7cd8aa958cde3f8544b85d9fdd5c1c6410445759fe60843d36cb09dcf34

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