Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e965c828b535c6…

MALICIOUS

PDF

78.1 KB Created: 2021-02-28 23:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c41835e958989456cd244204900d8aa SHA-1: d8e3090002e37f6d1b893ecd09fdc8e62154d8a9 SHA-256: b4e965c828b535c6fdb33396abdda149cd5649b0b9fcec854c7aea1ee1b3158a
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 URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to college activities, aiming to trick users into visiting the malicious URL.

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://xezojetit.ru/wix?keyword=activities+and+societies+in+college
    • http://artdebug.site/experiment_1_fermentation_by_yeast_data_tables_table_1_yeast_fermentation_dataglm7c.pdf
    • https://ginabedo.weebly.com/uploads/1/3/4/0/134017532/gibanosu.pdf
    • https://jibigevemur.weebly.com/uploads/1/3/0/8/130873945/majiluxevarabit_wipebawakakerud_tajapawo_jotonukite.pdf
    • http://tihefers.online/404845658407h6j8.pdf
    • http://future-techno.ru/40k_8th_edition_core_rulebookg9050.pdf
    • http://kipokefurur.mygamesonline.org/free_story_elements_worksheets_2nd_grade.pdf
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/josilutexosoraledaro.pdf
    • http://cashbackmoney.info/pozagagorikip9m7wj.pdf
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/72c53efe0.pdf
    • http://guvizaw.22web.org/48861846756.pdf
    • http://smallita.space/19786656911rni7m.pdf
    • http://antileqphh.site/metuxowaberogao3gg5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jedaxopopuko/android_games_like_pokemon_reddit.pdf
    • http://ruxuvejefo.epizy.com/define_grid_computing_in_computer_science.pdf
    • https://s3.amazonaws.com/vobuturinivi/sporcle_harry_potter_quiz_answers.pdf
    • http://xubivinonoloru.rf.gd/diablo_3_character_leveling_guide.pdf
    • http://ninanupazazudad.rf.gd/chrome_android_delete_notifications.pdf
    • https://s3.amazonaws.com/genedonapubefe/76572117098.pdf
    • https://s3.amazonaws.com/gofiguj/32499873181.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_off0000f606.bin
71e370c734a24f0a8c02bca74d411962af5d91dfa09eca60edd3c9c62b707199
pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 5060 bytes
font_01_sfnt_off0001075c.bin
16c1dfd6ca76404373e0ca35be6e6cd0a0bc4e56c2379701094609de4528ca49
pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 10580 bytes