Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f1466be827862c…

MALICIOUS

PDF

80.1 KB Created: 2021-02-28 01:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 153c89d705d882b801234a56bf593a07 SHA-1: d9c76d2ba491e8921e0a5c02e5e0b60344e8e227 SHA-256: 23f1466be827862c936097b775c90cdccc8a8db0672babd3faf7b1fe8c21929a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'xezojetit.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to job responsibilities.

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/aws?utm_term=what+do+medical+laboratory+technician+do PDF link annotation
    • https://cdn.sqhk.co/bisadidizi/ihcDAok/space_rangers_text_quests_walkthrough.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/how_to_pick_an_ar_15_upper_receiver5sect.pdfIn PDF document text
    • http://wamuvosuvebupa.iblogger.org/hp_stream_11_pro_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/nubowolimit/ghchgeA/15093648245.pdfIn PDF document text
    • http://golden-bridge.pro/dulumedolidn16g.pdfIn PDF document text
    • http://wizatone.iblogger.org/fmla_cert_forms.pdfIn PDF document text
    • http://gobigs.space/bapuzvy7na.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/OBjgkXO/59621773082.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://niwuzowebod.epizy.com/simple_present_tense_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/internet_manager_crack_6._32.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/9686105824.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/pisijetop.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/45075545960.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/allegedly_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/jasper_reports_parameter_set.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/80079766456.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/msds_sheets_owens_corning_fiberglass_insulation.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 5044 bytes
SHA-256: 215bbcc29b3bf2b6af94718861feff7065f576812a1876cd1969aa85fc1c37af
font_01_sfnt_off0001019c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019C 10204 bytes
SHA-256: 5543a549f07b2a7ba390c9eedb3d83481181f1db5a57bbaaee08797e72aee9a5
font_02_sfnt_off000124a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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