Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d4bc9a27196489…

MALICIOUS

PDF

66.6 KB Created: 2020-12-23 19:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42ec245bccf326a67815df4feabedf93 SHA-1: 5d8eb4ac8d0c5b22d64b0e579af088ac9d6169d3 SHA-256: e4d4bc9a2719648915b95602b98605b8ec90691a6be1236e8d204b2ee49f0262
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 domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'Airtel recharge plans', suggesting a lure to entice users to click the malicious link.

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://trafffe.ru/strik?utm_term=airtel+recharge+plans
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdf
    • https://tuvexora.weebly.com/uploads/1/3/4/6/134618292/xopawemiwe_bulabaruru.pdf
    • https://cdn-cms.f-static.net/uploads/4465390/normal_5fdc19f5ced31.pdf
    • https://tepugajir.weebly.com/uploads/1/3/0/8/130874129/tiduvusovo_govepadi.pdf
    • https://cdn-cms.f-static.net/uploads/4445735/normal_5fa20711c1c00.pdf
    • https://cdn-cms.f-static.net/uploads/4411512/normal_5fa839ae49428.pdf
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f91a43797ee7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/remufuzu/filleted_accounts_directors_report.pdf
    • https://s3.amazonaws.com/kikunojulejuj/33750979027.pdf
    • https://s3.amazonaws.com/roware/flocabulary_unit_4_answer_key_6th_grade.pdf
    • https://s3.amazonaws.com/fumiposamisur/broken_silence_natasha_preston_free_download.pdf
    • https://s3.amazonaws.com/tetazino/fuposegasizimepu.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_off0000bec7.bin
e1de7589a0ba292530ff24b0039caad855bc6cf08b4860795ab21c35f8db6fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC7 5184 bytes
font_01_sfnt_off0000d05b.bin
a8ba320a0ac8a73a5a8cc2c47ba30bd151ec5f51af4d5ac0b9daf85eaa8f1301		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD05B 1936 bytes
font_02_sfnt_off0000d9a0.bin
ab43261eb5936aa32933e860cbd054948022b8185160b068c785782553c7dad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 10464 bytes

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