Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccacde64292e7df8…

MALICIOUS

PDF

107.9 KB Created: 2021-02-24 06:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3ad68488e860b15e41410e61dd4e2b06 SHA-1: c821bca77387395600170a1ea98f2a337c01c16a SHA-256: ccacde64292e7df8f7f8fe1ea3f1488f04a3c9bac8b0dd34a4994ceedd14dfbc
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'baarspo.ru' suggests the document is part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further malicious content.

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://baarspo.ru/strik?utm_term=2020+amc+10a+problems PDF link annotation
    • http://universal-kirov.ru/communist_adventure_guidevo2pi.pdfIn PDF document text
    • http://fastgetme.online/additional_mathematics_form_5_notesalwo1.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/dHNiaHI/werozonejixiti.pdfIn PDF document text
    • http://watertea.space/20754190272s857b.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/jf1hehd/gunadenirefitavisa.pdfIn PDF document text
    • http://evilcheats.fun/4009846746422apb.pdfIn PDF document text
    • https://cdn.sqhk.co/mulepava/fojcghg/wubojorutimexirifepanivon.pdfIn PDF document text
    • http://replyua.site/bavivivesigamarobasukixak5vok9.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/Nvjjkje/slot_car_racing_track_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/javajadoj/iiyGgir/learn_spanish_practice_while_playing_games.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/ieaoNif/mechanisms_of_evolution_activity.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/rutufokedizon/tcs_c_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/leave_letter_format_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/32677476723.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_off00016726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16726 5452 bytes
SHA-256: 5dc1fb3ec67372ed65e84e4c494f43a9436e61d0099a3ec1d9bec1f2b3ee17d4
font_01_sfnt_off0001798e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1798E 11716 bytes
SHA-256: 0c226bf583539b1ba0d653c79fd61e48b439b9d3f68e2773f283f374e62c97b8