Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab107ac86bec90f…

MALICIOUS

PDF

80.8 KB Created: 2021-03-09 02:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bb3db0dfe901319f8cbc1df6eebcb81 SHA-1: dd5c727e177f4099bc9b628e7904c1ee20b4060e SHA-256: 0ab107ac86bec90fd563aa2a1284897e0fab1b6e4e0a9506336aff2ea13f8537
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely part of the lure to download a malicious payload. The document body, though heavily obfuscated, suggests a pretext of providing 'Microsoft excel test questions and answers pdf' to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=microsoft+excel+test+questions+and+answers+pdf
    • http://sovetnik53.ru/59407033090eld1k.pdf
    • http://goldstein.capital/23693934076qdnjv.pdf
    • http://teksalle.xyz/sub_zero_650_door_gasket_replacementt90ng.pdf
    • http://gnoogle.site/nereniduruwinujudt4tnq.pdf
    • http://bloodcraft.online/secret_lair_drop_series_wizards_of_the_coast_presents_after_great_deliberationju77y.pdf
    • http://vykupavto54.ru/meyer_e47_pump_cover240pw.pdf
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5fce97e8cbf84.pdf
    • https://cdn-cms.f-static.net/uploads/4450519/normal_6032ca98e0767.pdf
    • http://byseles.xyz/ds_160_form_sample_templateakth5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/widiku/48265372995.pdf
    • https://s3.amazonaws.com/lolaritemukole/samsung_series_6_55_inch_smart_tv_manual.pdf
    • https://s3.amazonaws.com/xezujuxoz/50606704142.pdf
    • https://s3.amazonaws.com/dalava/tebuxasenobanabovere.pdf
    • https://s3.amazonaws.com/tarizirefevifab/template_for_staff_training_record.pdf
    • https://s3.amazonaws.com/neporezofov/doxukaxunogebagogojeki.pdf
    • https://s3.amazonaws.com/sisaxu/actionscript_3._0_visual_quickstart_guide.pdf
    • https://s3.amazonaws.com/nitizobuv/75_kva_transformer_calculations.pdf
    • https://s3.amazonaws.com/xunilukegez/juzimobum.pdf
    • https://s3.amazonaws.com/lijulijowivaze/37205711339.pdf
    • https://s3.amazonaws.com/jamuluvuvava/vugonugutipejadugom.pdf
    • https://s3.amazonaws.com/zurovajij/how_to_connect_house_of_marley_bluetooth_headphones.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_off0000fea7.bin
e4ccda4e8e7935987ebe842cc82f3a73555de59f8a314139ae48130a1b93c7b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 5440 bytes
font_01_sfnt_off00011158.bin
43e525616f9509ef3479bab407d5cfa1596f05a6cd9c24f1d36b3705c07429c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 10760 bytes