Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7959094ac18dcb3…

MALICIOUS

PDF

76.7 KB Created: 2021-03-13 21:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c23c71cfd1856549658c0fadf00d2a24 SHA-1: 307f26bf527457f0a929f725eb67a828697cab88 SHA-256: a7959094ac18dcb363d10842aa47403e9270f15b03e6dc0ca3144cb1a47d8c7a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=illumination+calculation+formula+pdf PDF link annotation
    • http://favosiwuvaru.iblogger.org/kawagipet.pdfIn PDF document text
    • http://noxerazomefo.iblogger.org/cash_book_template_for_schools.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/spice_and_wolf_anime_episodes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_603e648bed715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_603bc67816883.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/pojotalumowupidifuz.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/wewiro/lusevanaterid.pdfIn PDF document text
    • http://boloxevukizuf.rf.gd/tegesakavetuwijeguduta.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/76683120004.pdfIn PDF document text
    • http://ditufadupogeju.epizy.com/wokapibosezipirazawe.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/xopog.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/wutegefolojunawizaxof.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/43099352149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb69104f-afdf-4bec-90c9-12851050aac4/powabamelidikozetoweke.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/visual_studio_code_32_bit_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/merriam_webster_dictionary_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0dd7cd-fece-4b83-9458-9d356d714d4f/bollinger_bands_squeeze_screener.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/70634290751.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/rufus_usb_bootable_windows_7_free.pdfIn PDF document text
    • http://tizepadeda.rf.gd/como_se_dar_bem_em_uma_dinamica_de_grupo.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_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 5060 bytes
SHA-256: 25cdf60f13de30ac66b95b9237af45a5fde3898134d2eabc9be623ee60420060
font_01_sfnt_off0000ffb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB9 11108 bytes
SHA-256: 06da05d7c62c15457111869f639c63fea7bfa31a2aef90a6ad045dcd0390eb46

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