Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7bb459b8b2593c8…

MALICIOUS

PDF

75.1 KB Created: 2021-02-25 02:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7746b2b3a90490414eade39ade4e0664 SHA-1: 71f8320cb5d64795f12f9ceffb5931b4a75582fc SHA-256: b7bb459b8b2593c85c94c03131960cf7f8cbff837c32f7583ced6b77cde4dd77
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though partially corrupted, suggests an attempt to disguise the malicious intent with seemingly innocuous content.

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://leonvi.ru/award?keyword=what+is+the+difference+between+plan+elevation+and+section PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375703/normal_5fcf08b42131e.pdfIn PDF document text
    • http://ostanni.fun/dark_souls_3_pontiffs_right_eyeoyrem.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/idifUhi/superheated_steam_calculator_online.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/iieSpdL/phoenix_brand_management_group_bbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fca932423a73.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/star_frontiers_races.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425238/normal_600897898c229.pdfIn PDF document text
    • http://tricitysikhs.com/58234522710oroqn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499984/normal_603654181913a.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/2YgOrhj/72169435703.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/eifjiia/questions_to_ask_the_financial_aid_office.pdfIn PDF document text
    • http://sabofogetazo.22web.org/35308654985.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5ff70b728a2f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligoroxenafof.atwebpages.com/53223146458.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/multiplication_tables_from_1_to_30.pdfIn PDF document text
    • http://mibodezoboro.rf.gd/textview_animation_in_android_studio.pdfIn PDF document text
    • http://pakatikik.epizy.com/lcvp_summary_report_aims.pdfIn PDF document text
    • http://baduwujik.rf.gd/86873929629.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_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 5548 bytes
SHA-256: 9d732314da7ab1527bd7cd43407daf57b8ad031f4b8ae7e00b497d9b8c7a2255
font_01_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 9904 bytes
SHA-256: 93908c8739a69ea534c9cbacf7c40e8fb483c74373e3f3d5793c89e702fb59cd

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