Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e4df882e3a46c9…

MALICIOUS

PDF

79.4 KB Created: 2021-03-16 21:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fb0df72a48feebadf87a7d09b58d330 SHA-1: 19ea81d0c2c9e031df4376d3d09cd22ecb972833 SHA-256: 33e4df882e3a46c9f60d4ab0445ad7258995e58ae2eccc1b890ee9ba9b9caf25
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'pelibifir.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Tv live apk'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/123?utm_term=tv+live+apk
    • https://static.s123-cdn-static.com/uploads/4388274/normal_5fef99ab1bb2f.pdf
    • https://cdn-cms.f-static.net/uploads/4454543/normal_6039526acc925.pdf
    • https://cdn.sqhk.co/xokebuzizo/hJDhgja/lisuzadip.pdf
    • https://cdn.sqhk.co/sejixikerut/Ojhieib/fit_the_fat_2_new_game.pdf
    • https://cdn-cms.f-static.net/uploads/4494432/normal_60153867e7ae4.pdf
    • https://cdn.sqhk.co/golemejexeno/QKq7egg/defuwominoza.pdf
    • https://cdn.sqhk.co/kinerufi/G2gchaw/28156848371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sesijesule/acetone_msds_sheets.pdf
    • https://uploads.strikinglycdn.com/files/0dc7e83a-d468-48d4-ad3d-d9d78ff067db/vanudanovilanasagepug.pdf
    • https://uploads.strikinglycdn.com/files/594e5be7-7e85-449d-9b00-0c86b2031eed/mavagobegolagiviko.pdf
    • https://s3.amazonaws.com/xuzakob/62631092960.pdf
    • https://uploads.strikinglycdn.com/files/a7f30178-766a-450e-a345-82c9735a80fb/kogesesav.pdf
    • https://s3.amazonaws.com/dalava/jack_and_the_beanstalk_story_questions_and_answers.pdf
    • https://s3.amazonaws.com/wupiwupiwot/internal_audit_training_courses_in_philippines.pdf
    • https://s3.amazonaws.com/bisute/22954643734.pdf
    • https://uploads.strikinglycdn.com/files/05553d81-a064-4cfd-b711-f828325adaff/62708308788.pdf
    • https://uploads.strikinglycdn.com/files/9ebc27e1-409a-405a-bba3-f0692a89cba7/is_gender_reassignment_surgery_free.pdf
    • https://uploads.strikinglycdn.com/files/5d1346f1-59ca-4938-99ef-f0197dc8c66e/nutcracker_the_story_of_clara_synopsis.pdf
    • https://s3.amazonaws.com/takateg/rosugedotipujetigogije.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_off0000ef70.bin
be18c00d6ddec4d4ede2e78528e706845e677b5543fc6dbf2000bbc4044825a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 4104 bytes
font_01_sfnt_off0000fd50.bin
2131a0ca1fe2d96d547ac564273b5fdcc9cd29e09e0b266ea6eab26afd95a343
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 10960 bytes
font_02_sfnt_off000122f2.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 4324 bytes