Malicious PDF — malware analysis report

Static analysis result for SHA-256 da61bc79a1cda65e…

MALICIOUS

PDF

68.2 KB Created: 2020-12-07 06:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f41764cab9b4207c700d5ba18bcd54ef SHA-1: f5884e508e2eb16ab950c467dcd4bcde4a800dba SHA-256: da61bc79a1cda65e402d74651232ae297cd1f87c68db56e89356e1aaf22aa4aa
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffset.ru/123?utm_term=beta+2+adrenergic+agonist+list PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5fc791f716823.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cf0b9e-2bbb-4f1d-a039-ce923c071136/58418464266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915fff5f-52f4-453b-85d0-d7fb2b208286/essentials_of_nursing_research_appra.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29ae41c8c7413143cd114/t/5fc57ca061e25426e1f28932/1606778017313/raroxavifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95fd082-4c0b-49f4-93cb-bc3152e612a5/70187657462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad73754-c499-4327-a593-e99205010e09/lasawebeser.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3b7dbc819f1cf4a415a9/1606302590574/at_a_certain_time_during_the_titration_the_rate_of_appearance_of_o2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf277bc819f1cf49daf79/1606283896232/xojigadimuninatalonovif.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/80644667279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1658bc72-e6dc-4158-92b8-6543541048f3/81292231331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/976f45e3-3043-4411-b238-cb36e24933af/gujijosuxefaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bd43fa-a3a8-4f7d-985a-b108e259d9f4/download_annamayya_songs_mp3_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd108bef3361272aeeb2ce/1606226059579/drill_guide_home_depot.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_off0000cd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD40 5288 bytes
SHA-256: 858d42877255ce686c00bf5b470bf805ece8f7ce685ca0aaff69ff515b6376de
font_01_sfnt_off0000df50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF50 11032 bytes
SHA-256: 0cb304c0993652fa22ec98e750f9fe2f31e81564751564a0d5d89f36b8c855dc

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