Malicious PDF — malware analysis report

Static analysis result for SHA-256 a228f8e431c1cfec…

MALICIOUS

PDF

79.7 KB Created: 2021-01-31 10:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 745f7ab3a2eb6c1ae60abd3649aa4bf3 SHA-1: 3db099e56a383dfd361cfb6835cac54edaee8b41 SHA-256: a228f8e431c1cfec3a8403c02df57b5c5a1a2ec1773b6793f7e2348f7feb7c10
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 embedded URI pointing to a suspicious URL, which is likely intended to trick the user into visiting a malicious site. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the phishing lure.

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://leonvi.ru/wb?keyword=rolling%20ball%202%20player PDF link annotation
    • http://ripuxojelirul.iblogger.org/50731631131.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/hiPFjCE/kibumewegejagugubuvif.pdfIn PDF document text
    • http://diniwesavaku.iblogger.org/tosafiwuxukobumi.pdfIn PDF document text
    • http://fewemika.66ghz.com/besigilelozofep.pdfIn PDF document text
    • http://melifalafijuz.22web.org/jevubefemeg.pdfIn PDF document text
    • https://cdn.sqhk.co/jazepoxamib/OHghEgd/interesting_facts_about_new_mexico_history.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
    • https://s3.amazonaws.com/tezofuretejom/pemovozanamax.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/enterprise_risk_management_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/aiims_jodhpur_ldc_recruitment_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/basha_telugu_movie_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/ceconomy_ag_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/fawiwadepijazabinode.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/upsc_2016_answer_key_insights.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/zigetinatawele.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/deool_band_movie_ringtone.pdfIn PDF document text
    • http://koxowasone.epizy.com/98745688270.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/nivadowes.pdfIn PDF document text
    • http://lepevalir.rf.gd/96970291073.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_off0000f00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00E 4896 bytes
SHA-256: 1e986291cec7563509dc7726bd04fa1e67cd6a88b20acdd590a05f2897d389e2
font_01_sfnt_off000100bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 10236 bytes
SHA-256: 2d2e69e3afd6bdf2b0b4c856d756dbd26791defb3ca9b1d53beebbfbe1d7290e
font_02_sfnt_off000123d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D4 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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