Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11f06bb05c7f241…

MALICIOUS

PDF

77.6 KB Created: 2021-02-25 17:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9bcbc8e31916fd3d197da3b780325b6f SHA-1: ef35b4a5690ebec83eb4026c134e1ee17e1b3bdc SHA-256: d11f06bb05c7f24122618df1fcdbed4d63c3f5d51a02d78ba02506ddd7c50dde
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to technical instructions. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the redirection to the provided URL for further exploitation.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=how+to+replace+lenovo+g50-80+screen In PDF document text
    • http://muzibatixabu.mypressonline.com/niv_study_bible_leather_engraved.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/can_an_obd2_scanner_reset_codes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412160/normal_5ffd30bbdd49d.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/toxisodujopisikemofev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460463/normal_5fdf987b2d27b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_6035f9f26e3c9.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/relgio_monitor_cardaco_speedo_80621g0evnp2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370309/normal_5fed563cc2bbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492880/normal_602a5a1c7c2f2.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/how_to_get_bigger_legs_with_bodyweight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5ff0d4ceca3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_600afabdb3ed1.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/dumujezila.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/how_to_change_ford_focus_2011_key_battery.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
    • http://nukilaba.myartsonline.com/how_to_use_mixer_kitchenaid.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/zuwijininixifosalumavijum.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/computer_systems_randal_bryant.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/62527864071.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/41038367108.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_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 5448 bytes
SHA-256: 1d94df251b410a0e1d1c1e8149adb5a80a74a5d0421bf74a5f4cc872eeca738e
font_01_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 10652 bytes
SHA-256: 5e63697aace15a3a78209fb7704df699a6637e4be7207776cda8234d32c9ecf1
font_02_sfnt_off00011af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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