Malicious PDF — malware analysis report

Static analysis result for SHA-256 608f47fa9dd8d9ee…

MALICIOUS

PDF

73.2 KB Created: 2021-01-06 08:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c55f53c068ec8ecf975709e9ed484cb0 SHA-1: 8bc2b08a514f87b9710c81633ced1e973672c090 SHA-256: 608f47fa9dd8d9ee3c444000c9894621d77429e97d7ae0ec7fad2334d53f0d98
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit the user's trust through a deceptive document.

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://trafficel.ru/aws?utm_term=cdc+brucellosis+reference+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453540/normal_5fef93300da61.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwejujorod/W3rihjB/fotugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447663/normal_5febee63ed212.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/jaxesabi/losel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5168f5cb-96dd-4f33-9414-e09465f649b4/kagadusumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db19628-c4a5-4db3-9177-b49aded1682c/panickker_switchgear_sriperumbudur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9535ce2-c7b3-4a09-ade7-fa36b351d6f3/lee_county_school_district_calendar_2017-18.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/fofirigedifokozonefijezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b912695-59f1-418f-9c4d-c01df64fdf7c/gununesurez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bbb487-4ecd-4096-8f73-fb29be842050/2find_your_home_search_property_resu.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/novoxafejivugezatov.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_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 5024 bytes
SHA-256: b6c8455fd0340343637dea1ef3461bda482b2c7964d3d3e2c245d9143886e7a3
font_01_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 10924 bytes
SHA-256: b99181de80875975584f683eacba4a0454205e1d90751ddec3e2bf7ccb1832fa

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