Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21f2e2291e097fd…

MALICIOUS

PDF

103.5 KB Created: 2021-03-18 19:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea85f31069ea4a195f511ac898384fbc SHA-1: e0c7a07cb238c2959b17459726b969b7769c0cfe SHA-256: e21f2e2291e097fd8256d028235c664773c21f1e0d13a04fbd4df7aff6b17d6f
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'https://bologen.ru/award?keyword=basic+arabic+words+with+english+translation+pdf'. This URL is presented in a way that suggests it is a search result, likely to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=basic+arabic+words+with+english+translation+pdf
    • https://cdn.sqhk.co/tutadazi/ifdggm7/apoquel_dosing_chart.pdf
    • https://cdn.sqhk.co/fewoxenovof/hdpgfhb/meter_reading_jobs_ni.pdf
    • https://cdn-cms.f-static.net/uploads/4403816/normal_6029d2ff213e6.pdf
    • https://cdn.sqhk.co/fipufose/hiBOhir/warhammer_quest_card_game_expansion.pdf
    • https://cdn.sqhk.co/libuzewis/jjerWBK/tai_game_launcher_tuner_for_boosting_performance.pdf
    • https://cdn.sqhk.co/zonelatu/ghhcigT/vintage_wallpapers_for_iphone_xs_4k.pdf
    • https://cdn.sqhk.co/tomubozes/dhdjgha/assistive_touch_iphone_x_max.pdf
    • https://cdn-cms.f-static.net/uploads/4482215/normal_604cbe122a555.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gupojakami/94250893120.pdf
    • http://bunetexugefu.rf.gd/53202807644.pdf
    • https://s3.amazonaws.com/bifamomove/radifoxegobib.pdf
    • http://fugovolit.rf.gd/anticorpi_monoclonali_sclerosi_multipla.pdf
    • https://s3.amazonaws.com/xixonu/ignou_assignment_solved_free_2014.pdf
    • http://bomafedugu.epizy.com/10_class_maths_book.pdf
    • http://pejefovad.epizy.com/american_express_platinum_card_number_format.pdf
    • http://kuxomexepus.epizy.com/chote_baccho_ki_kahaniya.pdf
    • https://s3.amazonaws.com/vokeri/akhisarspor_forma_2019.pdf
    • http://womaxomud.rf.gd/type_two_diabetes_mellitus.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015c21.bin
19a0f4dbf778c7a94d14ed64f098127727cf0c055e95225d0788c5ae970f38d7
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15C21 29264 bytes
font_00_sfnt_off00011fb7.bin
93d26e9444521e298adc3c5a2820f5f52baac7c228f5f68ca4d3049e6cafbdcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB7 5700 bytes
font_01_sfnt_off00013327.bin
78c55476dfbb819a729d9acbd1cbaf1900b903a8246d9cda9746ae45dd34f080
pdf-font-stream PDF embedded font (sfnt) at offset 0x13327 13124 bytes