Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8360c71ba04a2dc…

MALICIOUS

PDF

64.5 KB Created: 2021-02-06 10:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4f86cae3ecb4f1ebdc4e4ea3041eb4f4 SHA-1: 71c4b4fedeb1954e858ca0e1eedfcfc95d85a41a SHA-256: d8360c71ba04a2dca39cec5b8c9a4c2834bd9ec7008b8cb5bc03a08a09417c8c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://seumenha.ru/aws?utm_term=almost+friends+parents+guide', suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are commonly used in phishing and malware distribution campaigns.

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://seumenha.ru/aws?utm_term=almost+friends+parents+guide PDF link annotation
    • http://mmmmmme.space/understanding_nutrition_15th_edition_freeraolb.pdfIn PDF document text
    • http://policyhelpcenter.com/footprints_without_feet_extra_question_answer_edumantraxhaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_600ead2d8234b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5febee1be07e5.pdfIn PDF document text
    • http://kinorio5.xyz/top_space_war_moviesteogf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_5fd77fee2fbec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5ff3a15b3a33a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5fea24d32ee87.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/babetafaperaxov/porabililerotib.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/vubedededetegevulavizudij.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/keto_food_guide_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/lusuwesazugenixag.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/android_browser_auto_refresh.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/accelerometer_calibration_free_apk.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_off0000c1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B0 5348 bytes
SHA-256: c445d4c87bd0d4fa31da7da6654714f869b96e1b6fe6797eb54291abda6f18b4
font_01_sfnt_off0000d3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C6 9820 bytes
SHA-256: 54ed7ab69d29d31308e114aa352445f91a4a83aeafc7100f1486289dd836113b