Malicious PDF — malware analysis report

Static analysis result for SHA-256 521114c362a4abc1…

MALICIOUS

PDF

79.7 KB Created: 2021-03-30 02:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33f958b8733e713102fe77f2ff2fa7d9 SHA-1: 5da2382c5e05e330a2d6293c30134b70d96c11a0 SHA-256: 521114c362a4abc10614221aa8babafebd8b977dd0eec78bef95082bde6e0361
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website offering 'opticover wifi repeater troubleshooting'. This URL is flagged as malicious and is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=opticover+wifi+repeater+troubleshooting
    • https://cdn-cms.f-static.net/uploads/4392237/normal_604a0fa85954a.pdf
    • https://static.s123-cdn-static.com/uploads/4368504/normal_60023712ec24a.pdf
    • http://fowajasatis.iblogger.org/85642691642.pdf
    • http://detonic-hypertonie.website/jeguvojununudafidefz7be.pdf
    • http://komomutuba.22web.org/content_analysis_of_facebook_posts.pdf
    • http://qlemelest.online/is_blackweb_a_good_brand_for_chargersoo6u3.pdf
    • http://devicesprotectionforusers.site/how_to_download_purchased_songs_on_rock_band_44vf22.pdf
    • http://shtangelkipokupkiitd.online/mekoxanabasapopowufakqesd.pdf
    • https://static.s123-cdn-static.com/uploads/4401691/normal_5ffd54675de94.pdf
    • http://artistichomesolutions.com/begubhbrwr.pdf
    • https://static.s123-cdn-static.com/uploads/4461232/normal_5ffc353adf948.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_21afd773ece347dfa4b8fd8801697a25.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9cde0f06-be3f-48dd-84f2-24906bd9f803/yeh-shen_a_cinderella_story_from_china_theme.pdf
    • http://xonumubik.rf.gd/search_by_image_chrome_extension.pdf
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_850644b64cd14dc091d5c80dcbe2f92b.pdf?index=true
    • http://sidiwen.epizy.com/wopegatedosogu.pdf
    • http://pagilupoge.rf.gd/all_quiet_on_the_western_front_book_download.pdf
    • https://s3.amazonaws.com/welanisowari/binary_options_trading_platform_demo_account.pdf
    • https://uploads.strikinglycdn.com/files/61f4f170-02f9-475a-877d-621994264246/45656745451.pdf
    • https://s3.amazonaws.com/bulujono/burmese_days_ebook.pdf
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_27ed3cb83e60420db4847a17687c17cb.pdf?index=true
    • https://s3.amazonaws.com/paropabaru/bowoxidabapifokubi.pdf
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_6dd48563d858497ea96cbe805b3ab03a.pdf?index=true
    • 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_off0000f5db.bin
04d08a964db03cde458c1a341b0d14b946c7ca13d085bfacbfa65a49236e43eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 5596 bytes
font_01_sfnt_off000108f2.bin
15c4d45b8fd7bfb4af633e7639f6ec2510c8633dff4242b1a61f3491c715a9a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F2 11880 bytes

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