Malicious PDF — malware analysis report

Static analysis result for SHA-256 9689f785baa2503f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 22:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf96da898f8538d5462df2eba1c59999 SHA-1: d72113381957e912b7a4b66a841937335b3e22de SHA-256: 9689f785baa2503f715e5bdb2b96c9cec2fd34a794fc977fa250546a2073db1a
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs that lead to external websites, suggesting a phishing or malware distribution attempt. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, pointing to the use of external links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=ib+chemistry+cambridge+study+guide+pdf
    • http://kufudizaja.22web.org/burger_king_gutscheine_oktober_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4381543/normal_60493b5fa98c4.pdf
    • http://galilevulaxun.iblogger.org/line_6_spider_iv_30w.pdf
    • https://cdn-cms.f-static.net/uploads/4451363/normal_60198f5b2d44e.pdf
    • https://cdn-cms.f-static.net/uploads/4460471/normal_5fd89eb424efc.pdf
    • http://fuxutigox.mypressonline.com/3rd_grade_go_math_book.pdf
    • http://fabujisaw.mygamesonline.org/9551170265.pdf
    • https://cdn-cms.f-static.net/uploads/4408335/normal_600b7456349f8.pdf
    • https://cdn-cms.f-static.net/uploads/4495536/normal_602a3d58bdc3d.pdf
    • https://cdn-cms.f-static.net/uploads/4452612/normal_604cb451b4048.pdf
    • http://kujinatazema.sportsontheweb.net/focused_antenatal_care_in_ethiopia.pdf
    • https://cdn-cms.f-static.net/uploads/4490757/normal_605a64b2c1d19.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sakolowofusemog.epizy.com/contaminacion_atmosferica_en_colombia.pdf
    • https://s3.amazonaws.com/xoferuzu/fios_tv_guide_boston.pdf
    • http://jixosakotipol.epizy.com/5905616329.pdf
    • http://nufolupi.epizy.com/71795234785.pdf
    • https://s3.amazonaws.com/fulosobezur/16079614477.pdf
    • https://uploads.strikinglycdn.com/files/95198cc5-6219-44d0-b264-705ef2c3b28b/monitor_cardaco_garmin_forerunner_235.pdf
    • http://bodegifu.atwebpages.com/nigurazulixonafovizuji.pdf
    • http://todidetiped.onlinewebshop.net/the_very_busy_spider_activities_eyfs.pdf
    • https://uploads.strikinglycdn.com/files/a4094a30-751b-4e53-9f09-39ab9435e505/21248962744.pdf
    • https://uploads.strikinglycdn.com/files/e69893e4-41dd-4a81-8497-8fc530f9abff/algebra_2_multiplying_complex_numbers_worksheet_answers.pdf
    • https://s3.amazonaws.com/mekonulegipero/asus_driver_tool.pdf
    • https://s3.amazonaws.com/jolozidabi/ages_of_vikings_apkpure.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf3.bin
6923cbc9c4c064f891afb73cf0e23cca0b92ba97922f0de958acab340207d863		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 5716 bytes
font_01_sfnt_off00010040.bin
8891d57c52b5a48845e7a63e20d55fb61ec11831681daa2a1b7d0e9da3684940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 11000 bytes

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