Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f9383f426e94c5…

MALICIOUS

PDF

106.1 KB Created: 2021-02-22 16:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38d9a6929e29bc0263dd22e03170fa88 SHA-1: 9a1011a9665b82a57a8e78062b8c2062a46eba34 SHA-256: b5f9383f426e94c51a16e0b1e84da30a7f50831579eb65edb5fa8eb3654058f4
136 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains suspicious links to domains like 'seumenha.ru' and 'securityofusersdevicesonline.site', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to 'V4 mmorpg apk', indicating a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wix?keyword=v4+mmorpg+apk
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/vumufunis_pijojigapudi_juzodawasolitu.pdf
    • http://keysecret.ru/business_letter_format_example_templateoexav.pdf
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/fisivupuvig-notilut-jezub-ramanugupo.pdf
    • http://daating19.site/block_strike_pc_20207ugkc.pdf
    • http://obzorov.site/android_studio_update_gradle_pluginfd1h1.pdf
    • https://duxosefexi.weebly.com/uploads/1/3/4/6/134605181/6302126.pdf
    • http://fixmarker.fun/juneau_alaska_walking_tour_map6nu9g.pdf
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/cd772ab19194.pdf
    • http://bigswinner.space/nyu_langone_employee_occupational_healthpy4zc.pdf
    • http://securityofusersdevicesonline.site/46726167634911so.pdf
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5fd7b0abcdf11.pdf
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5fe17f0f9c5d3.pdf
    • https://vifutezovabul.weebly.com/uploads/1/3/1/4/131408528/deruxilapu_tubogivupud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gurupixabogivaz/panazuges.pdf
    • http://wiwowefitupek.epizy.com/job_application_cover_letter_template.pdf
    • http://budokukikaririd.rf.gd/19971409550.pdf
    • https://s3.amazonaws.com/ribowexulo/chicago_movie_soundtrack_zip.pdf
    • https://s3.amazonaws.com/zunaporam/42619822159.pdf
    • https://s3.amazonaws.com/rowubunak/cancionero_de_baena.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f413.bin
9698734474a475a812ee398f07e8668e6261c1f754eaf97744f960231612c214		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 20744 bytes
font_01_sfnt_off0001330f.bin
729b55fbd189259a3c81b11a956cfd58377fce74d6ba16bed9a8b4bde8e94af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1330F 4480 bytes
font_02_sfnt_off00014239.bin
a006a21a4c334fcf21a7034f39dfbdb11496f0e430ba57a1fc5d2b5478520932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14239 10860 bytes
font_03_sfnt_off00016799.bin
930c3411d16787992352ba44e384977a3962e1243da24ddecdc9817b1a6f7558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16799 21840 bytes
font_04_sfnt_off00018cb2.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18CB2 4324 bytes

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