Malicious PDF — malware analysis report

Static analysis result for SHA-256 64668a0293ee0e2f…

MALICIOUS

PDF

106.9 KB Created: 2021-04-07 19:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b3be532f072ba6e9c46a025f16e12f SHA-1: 79b476731a45c61231cd197df4ebf04fe96d977d SHA-256: 64668a0293ee0e2ffe374bd1bb97972ab5879cf72dfb92dd1f2b32ca5b1527a4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high heuristic firing for an external URI. The embedded URL, https://nipisod.ru/wix?keyword=iracing+f3+setup+guide, is suspicious and likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure related to an 'iracing f3 setup guide'. No scripts were extracted, but the PDF structure and the presence of external URLs suggest an attempt to redirect the user to a malicious resource.

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://nipisod.ru/wix?keyword=iracing+f3+setup+guide
    • http://lezagerodise.iblogger.org/different_types_of_leadership_styles_with_examples.pdf
    • http://demejizato.22web.org/job_application_letter_format_in_gujarati_language.pdf
    • https://jadamoxor.weebly.com/uploads/1/3/5/3/135344742/94eeb24f8d38.pdf
    • https://dofewomal.weebly.com/uploads/1/3/4/5/134510420/3864860.pdf
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/6f7c10fab0a76.pdf
    • http://sajiwurejedetu.sportsontheweb.net/crp_blood_test_detect_cancer.pdf
    • http://zawopim.mygamesonline.org/pathfinder_character_folio_fillable.pdf
    • https://makogoporuri.weebly.com/uploads/1/3/4/8/134868573/00d65ecfed.pdf
    • http://kagutakonupana.iblogger.org/tipos_de_placa_bacteriana.pdf
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/2877827.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tumuzu/job_interview_question_and_answer_sample_tagalog.pdf
    • http://lodonevubepivor.epizy.com/45911424331.pdf
    • http://fuvarijes.atwebpages.com/3d_maker_for_autocad_crack.pdf
    • https://s3.amazonaws.com/pezofut/how_to_create_a_kitchen_nook.pdf
    • https://s3.amazonaws.com/fulazelof/bible_quiz_questions_and_answers_for_youth_with_reference.pdf
    • http://dolifusekaxug.epizy.com/riwezadodide.pdf
    • http://teramadobowakin.epizy.com/penamijosubazasojovino.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000150a0.bin
3d7fdda4e721ee7bea893d7073e291034c3f22870c68a7197c78dce44553ab3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x150A0 5392 bytes
font_01_sfnt_off00016305.bin
843b43d38c979ad9ecf6de0fa8289ccb802aa065e48bea29e2afdcf748bae762
pdf-font-stream PDF embedded font (sfnt) at offset 0x16305 10656 bytes
font_02_sfnt_off000187a4.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x187A4 16204 bytes