Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d665959e1ca703c…

MALICIOUS

PDF

107.5 KB Created: 2021-03-23 18:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05fe4c669f3180808969c0e3c1bff5c5 SHA-1: 7ca94be0a8000bde4230469a557dd2809d238875 SHA-256: 9d665959e1ca703c119d39c2278354c656ecb7816b54c671a875a2c8c00442f6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'learn korean phrases pdf'. No scripts were extracted, but the presence of external URIs and the ML detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/award?keyword=learn+korean+phrases+pdf
    • http://shopsmmv.site/sawirivatokojupgmp0.pdf
    • https://cdn-cms.f-static.net/uploads/4383450/normal_6040595ecb039.pdf
    • http://newipufisatag.scienceontheweb.net/first_aid_usmle_step_2_cs_7th_edition.pdf
    • http://xepokex.iblogger.org/lafusipasuzetapugodij.pdf
    • http://nenodipemuxok.mypressonline.com/53594495758.pdf
    • https://static.s123-cdn-static.com/uploads/4450507/normal_5febdc4f2a8bb.pdf
    • http://dewisazovuvoxi.mywebcommunity.org/ezgo_parts_san_antonio.pdf
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5fdc8bdda023f.pdf
    • http://vesixadaw.22web.org/ludugoje.pdf
    • http://dragonflysagewellness.com/xemomapumifisozijoyr0ah.pdf
    • http://modezewop.mygamesonline.org/16348444823.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fakulolipokate.epizy.com/std_testing_results_template.pdf
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_ca91fcf1cc81424dbaa4bbba63aa5d6a.pdf?index=true
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_18a981ef3b0b4729ba735f53ece59ac8.pdf?index=true
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_a6c3149509af4ec691d6cb23297ec9d9.pdf?index=true
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_25a192928f37443fbbbe1b7ff31c1649.pdf?index=true
    • http://wovogaxix.epizy.com/keto_diet_food_pyramid.pdf
    • http://tirosonitagaxe.rf.gd/kajaria_vitrified_floor_tiles_catalogue.pdf
    • http://tiluxusimutine.atwebpages.com/conair_weight_watchers_plastic_body_analysis_scale.pdf
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_32cf3acdd66f46ed84152ab819df7633.pdf?index=true
    • http://sovuberexizizir.epizy.com/wodunukaxojoliwovadogemu.pdf
    • http://denefarow.rf.gd/ya_no_eres_pan_y_vino_letra_y_acordes_piano.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011585.bin
4b5ace93719fbcaf05ee148d0232998b50c4ff8c2b5cfffb7eb92555bc297fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11585 28380 bytes
font_01_sfnt_off0001660f.bin
6a271c06a19953d62a178b450d6d5cd6d8e29511dd02dd6e9ceebfd9727650da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1660F 5104 bytes
font_02_sfnt_off0001776a.bin
7f9f1aaff396aa268bb522a2a61bb7d009173a41e68c32b92c8aacb287e90457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1776A 11676 bytes

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