Malicious PDF — malware analysis report

Static analysis result for SHA-256 21262ff78c73bc63…

MALICIOUS

PDF

80.4 KB Created: 2021-03-27 14:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52534a4774b3fdeb399e0cbb70432ac7 SHA-1: e530f03a44a9e992fb18d086ebc16beb21e333fc SHA-256: 21262ff78c73bc6335758d11d931b2a6ead416e6a41a020af952e3e0cb41a40b
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. It contains an embedded URL pointing to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though truncated and partially garbled, suggests a lure related to 'exercises pdf'. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/award?keyword=les+adjectifs+et+pronoms+d%25C3%25A9monstratifs+exercices+pdf
    • http://portkamesto.site/chase_checking_account_balance_sheetoumrs.pdf
    • http://accface.in/windows_10_pro_keyboard_shortcuts_not_workingy5v5q.pdf
    • https://cdn.sqhk.co/numavagoko/qgfigjd/tapetuwujumafimuduzofo.pdf
    • http://tigitaja.iblogger.org/direct_method_and_grammar_translation_method.pdf
    • https://cdn.sqhk.co/jolodovi/ghjvtPa/84118584368.pdf
    • http://auth02mobility.com/90582103355jkpeo.pdf
    • http://lnstagram-helps-contact.com/400_day_clock_repair_guide_horolovar.pdfw558t.pdf
    • http://servempieza.site/15165202351572vz.pdf
    • https://cdn.sqhk.co/luwibajik/orieQja/merriam_webster_apk_paid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/juzewojavomofew/action_movies_online_free_full_movie.pdf
    • http://gaxomilajow.epizy.com/predator_3500_generator_parts_diagram.pdf
    • http://jamopuv.epizy.com/roku_streaming_stick_plus_remote_volume_not_working.pdf
    • http://fidazel.epizy.com/jp_morgan_long_term_capital_market_assumptions_2017.pdf
    • http://muropep.epizy.com/spiderman_meme_template_glasses.pdf
    • https://s3.amazonaws.com/nazekisigiduz/42678672889.pdf
    • http://gapajafikotu.rf.gd/how_to_loosen_the_straps_on_graco_snugride.pdf
    • http://gerutinikokowa.epizy.com/46784467589.pdf
    • https://s3.amazonaws.com/kasuwevovog/cash_book_format_for_small_business.pdf
    • http://bazofigi.epizy.com/what_can_sociology_majors_do.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_off0000e933.bin
af6eb991462764bd2dfd1c6035eea1d710dee10d355b1bc733d6fbac1724d40a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE933 5284 bytes
font_01_sfnt_off0000fad5.bin
c9e05b5337288509e7a3a83ff07586043b6526e6d799d7805a747613c91acd9d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 12684 bytes
font_02_sfnt_off00012331.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x12331 4324 bytes