Malicious PDF — malware analysis report

Static analysis result for SHA-256 054e7cffa68ae0d1…

MALICIOUS

PDF

77.3 KB Created: 2021-02-10 21:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc61c73bf95138841224c5cfcd1600fc SHA-1: d04c7c7586aac6d568c745edc0532641847d9485 SHA-256: 054e7cffa68ae0d15a401f55f75bdb4e6d629120b5f91cd31fcd00e04d936a3a
112 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an embedded URI pointing to 'jottigo.ru' combined with heuristics for urgency and invoice lures suggests a phishing or malware delivery attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI are sufficient indicators of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/aws?utm_term=letterhead+template+word+2019 PDF link annotation
    • http://swiss-gear.store/dafuxojeliwidapovofius1m4.pdfIn PDF document text
    • https://cdn.sqhk.co/ketalidukepi/gfljfaL/bujaw.pdfIn PDF document text
    • http://ek-arenda.ru/emulsion_polymerization_process9dpgc.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/jejghbJ/gafakorovunovikidadorele.pdfIn PDF document text
    • http://stav-games.ru/kidzee_franchise_agreementbiaa9.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/gdjerja/best_city_defense_games.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/cUcjjei/41274032964.pdfIn PDF document text
    • http://tb-films.ru/lolikakesotuup6as.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xurixado/sap_biller_direct_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/jaboxibezetutinuvugun.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/99101875152.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/nevadu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/the_bezels_of_wisdom_free.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/ciao_adios_320kbps_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/best_android_borescope_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/avast_free_32_bits.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/palo_alto_5220_series_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/ginijemepikibegexepuket.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/gutadorenubewi.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/anarkali_disco_chali.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE090 5172 bytes
SHA-256: 9a86ed97b11fb8890b0c40c5f842e7d1be2c21f1d0b71dbc488f24169061d1fa
font_01_sfnt_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 11864 bytes
SHA-256: ab3e4b997d7ac8dfd17f3b8dc8c6ebe397e225b7f8fcafdf796a0fd599841997
font_02_sfnt_off0001196d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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