Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cab8ba1c2209d1…

MALICIOUS

PDF

69.8 KB Created: 2021-01-21 19:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9f12bfbb80936fa5d7900fc135f083a2 SHA-1: 13a19a4a91c51849eb91642c5ac1ea4301a1c7bf SHA-256: 22cab8ba1c2209d1517f4fa9e22ac785e2ffabdaad65a998c90c9c231e57c89e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, suggests a lure related to an educational worksheet.

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://trafficel.ru/123?utm_term=i+have+a+dream+worksheet+3rd+grade PDF link annotation
    • https://cdn.sqhk.co/xasakeza/iimjdha/microsoft_planner_in_teams_export_to_excel.pdfIn PDF document text
    • https://site-1221974.mozfiles.com/files/1221974/2020_election_results_map.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/kiguvuguxopovaku.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/cijxgg9/dajagofutinomuxalisipu.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/3gkibmv/lupurenilitawozorezig.pdfIn PDF document text
    • https://site-1168081.mozfiles.com/files/1168081/viwadivupatisat.pdfIn PDF document text
    • https://site-1174052.mozfiles.com/files/1174052/eliza_wasn_t_looking.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/Xibhhij/50421852096.pdfIn PDF document text
    • https://site-1172701.mozfiles.com/files/1172701/statutory_audit_report_format.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/lemefofutomapox/fevezimojonuze.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/15958269817.pdfIn PDF document text
    • http://xifedesekelogu.epizy.com/esc_guidelines_infective_endocarditis_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/jufefi.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/baabul_full_hd_movie.pdfIn PDF document text
    • http://xarifilaf.rf.gd/tibakuvukefetesubononavij.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/febuvufisudadepewam.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/blender_2._72_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/angular_bootstrap_popover_form.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_off0000cff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF9 5524 bytes
SHA-256: 37de701fff3a1419dfe18ccb70047a23f3ab09754132bae466ab3ca800bd97bd
font_01_sfnt_off0000e2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AC 12176 bytes
SHA-256: e7db3d3b6ec9549d380bbe0a86481eb86cf21691c7dd4c3064c5b546ac10b183

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