Malicious PDF — malware analysis report

Static analysis result for SHA-256 f400f1af8c05b00c…

MALICIOUS

PDF

82.2 KB Created: 2021-03-01 03:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a04f7d8f142c5ef81786561e5208dc8 SHA-1: 100c77257f7cc02fc3904d92ec11a8ecb5723943 SHA-256: f400f1af8c05b00c6ec20814286aab4500664245fe92361479ea9278fcdf2314
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=history+of+modern+design PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408704/normal_600e5e06961b3.pdfIn PDF document text
    • http://fojudesekuxujef.22web.org/state_fair_map_2016_attendance.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/HiJSJia/82169037975.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/2006_mercury_25_hp_4_stroke_specs.pdfIn PDF document text
    • http://tularafujebok.iblogger.org/ghost_boy_book_jewell_parker_rhodes_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/3hajhhj/muzujeput.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490369/normal_5ffde282ac697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fd65757085b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_6037e53da311e.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/lupuvogotog/jezagoluvilimubidedixu.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/charlie_puth_songs_attention.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/nodudevarujapasarutezab.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/coelho_sabido_2_ano_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/how_do_you_change_the_batteries_in_an_xfinity_remote_control.pdfIn PDF document text
    • http://modunozig.rf.gd/types_of_sentences_worksheet_4th_grade.pdfIn PDF document text
    • http://rezekeruj.rf.gd/zanijetidugigo.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_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 5048 bytes
SHA-256: b7256f46220a9fccdbdd00091096fbf7592e031cf696c4e0994d054b26119ca3
font_01_sfnt_off000115b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B1 10940 bytes
SHA-256: a77a9bd1fb7d956732f4ce3dd2eb15b5e88760d064f63ff9f2c0da8c5ea08b65