Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de986ef2051b207…

MALICIOUS

PDF

68.2 KB Created: 2020-11-23 12:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a857c7f2ce20fcf0bbd2a88a2cce2d58 SHA-1: 1cb62735b2e84ac00a344c5b522b631dff0fa40e SHA-256: 3de986ef2051b207dbb686793db181d6ca9653fcbad5cf85583caef5a80fdc1b
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also flagged it with high confidence. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

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://trafficel.ru/aws?utm_term=cavernous+malformation+radiopaedia PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1dab0ca-0156-4c26-8618-d6a83d82da7e/mandalas_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/indian_food_calorie_chart_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9178a05f-0f68-4163-9a95-86e240c572b5/vofidamotawasinitepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e086f80-2293-44fd-9a48-dd099df8fe65/binepilagatigibesebajova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8174212d-7129-4044-a098-32f5d48fd003/19400855504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a767b92-1d62-4d88-80a9-f96932f9b126/wukigologa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebcc8341-d2f6-4ae2-9e40-2c7d3df25889/togikerulutoxerikivewoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79112b4f-f668-4020-871e-527ae3f4cbc7/softxpand_duo_pro_keygen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c895c77-3038-4643-a0a4-de7b1dc38dc9/26892527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d79b1f-5cc4-4761-9fbd-753e8d7955e5/manual_water_bottle_label_applicator_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/tilumuxoxajajagaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85376ac-f676-4eed-b136-1cb341954001/63401389082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5214d0f-0ddc-4d56-a3c2-850bdb778ad5/plan_y_programa_de_quinto_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614ff062-725b-4c80-bbd3-7906076e3d23/zipuvexapa.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_off0000cf65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF65 5152 bytes
SHA-256: 964a8a74155107d9fa5fc06067ed5963c45eebd486872e3a33974c44fb2345dd
font_01_sfnt_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 10520 bytes
SHA-256: f54800c81de7d6539806c5545f5dc4c4d306cd4a9e8f055e3740b9b06118edf1

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