Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb3a8d4ab691eef…

MALICIOUS

PDF

64.9 KB Created: 2020-12-14 18:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 45d9d91b8dbd091d635f2def4bc6e857 SHA-1: 1215d3ce98a18d740ce65f3cae0f1ea11d4c61c1 SHA-256: 3cb3a8d4ab691eef50867f9d3564c1e402dbe13542c001a1391bafea32854e29
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that points to a domain commonly associated with phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of an external URI and the nature of the ClamAV detection suggest this PDF is designed to redirect users to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=applied+statistics+and+probability+for+engineers+5th+edition+pdf PDF link annotation
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/ziwovad_japepirepi.pdfIn PDF document text
    • https://moxoviwepikiwu.weebly.com/uploads/1/3/2/8/132814726/8613446.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/devuxuzejozam/93222438327.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/95696295810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9498b69-c235-4f63-9ba1-86822c414a02/funciones_del_psicologo_educativo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab4f203-3c61-41b1-8dd0-0f866881d70d/ps_form_2976_fillable.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce3ea856cd0c1ac3880085/t/5fd07c33ef76c20f2d4a27ac/1607498808297/fobupovedutep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1904ff6d-9f0f-4675-a7b6-a2900a2ac0af/vowimefadimex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9a4049-43a2-4fe7-8f8c-b27395af6a4f/area_code_204_canada_time_zone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/448c9d04-241b-457f-ad94-a1b08800501d/62391931841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc72e7e-8569-4fd3-9706-7682a34a71be/penofofawazezi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19ab11452f90b7fea4d21/t/5fc3c32e3f75b166434718a0/1606665006666/possible_outcomes_tree_diagram_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c539f86-a932-4ae9-bd06-822f35d88773/47571151561.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37b9d24b06a7eb30fb4b9/t/5fc4b7c9f81c9a2a0c37414f/1606727625374/mepurixakewunagesuxex.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_off0000becf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECF 5772 bytes
SHA-256: 3ce2219397621fbfa4a20458e56c5ff64e47059fa50d36c8432a53f1b6b3bfb6
font_01_sfnt_off0000d27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27B 10540 bytes
SHA-256: fb932a44b8e6b0d684ed14fa47f133838714916186c4523b32b8618c62a2286b

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