Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb3558a1878242a…

MALICIOUS

PDF

79.2 KB Created: 2021-02-19 21:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6c67371532c5d92606af27a2629d4623 SHA-1: 453f205ea95fc611c50a50ccb4a9360a568d06be SHA-256: 5cb3558a1878242af5bcc3ec4c15767b809716a52f772a43f47dcc83edc7e382
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, specifically as a phishing trojan. It contains an embedded URI that directs the user to a URL designed to appear as a search result, likely to trick the user into clicking it. No scripts were extracted, but the presence of external URIs and the nature of the ClamAV detection suggest a phishing or credential harvesting 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://jottigo.ru/strik?utm_term=isotonic+solution+definition+biology PDF link annotation
    • http://xidonezojo.22web.org/ielts_speaking_mat_clark_free.pdfIn PDF document text
    • http://stonersfranchise.com/lunefuwuxesafunopz135v.pdfIn PDF document text
    • http://maykistore.ru/19025611806t8r92.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/5449029429lug63.pdfIn PDF document text
    • http://lefegesitorezod.iblogger.org/iclone_character_creator_2_full.pdfIn PDF document text
    • http://abistrans.ru/finding_domain_and_range_algebraicallyj6113.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/joDibjj/fidirorazegipi.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/fMaicjk/turbocharger_price_in_bangladesh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/somisilegex/brche_krzen_erweitern_bung.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/errata_sheet_deposition.pdfIn PDF document text
    • http://veputowiki.epizy.com/baleridasalonevefisokedi.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/84167728657.pdfIn PDF document text
    • http://ziwufuv.rf.gd/chapter_5_infection_control_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/billionaire_casino_unlimited_money_apk.pdfIn PDF document text
    • http://gukasitaxe.epizy.com/bomb_it_up_apk.pdfIn PDF document text
    • http://ninonasoligu.rf.gd/22744949433.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/cutting_tool_engineering_buyers_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF763 5064 bytes
SHA-256: e07ec4e64b95e879ba7641e534be0dc4d9c97b0502ff4af6e309fffbd1e6972f
font_01_sfnt_off000108bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 11532 bytes
SHA-256: 813abdf765b4fd43e8c3c3d03aab2b7ff7d5867255c8718f84a56ed47cb2f2c7

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