Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b94f19862280ab…

MALICIOUS

PDF

64.7 KB Created: 2020-12-18 22:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1e401542315fbb79787e013cc619800f SHA-1: e8bdf25acb9333cce9e06a5ec2cc187657aa6df6 SHA-256: 37b94f19862280ab97501eb9fe7dbbbce615326a8a32fc31fbf1d0cf3cad88b8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick users into visiting a malicious site, consistent with spearphishing tactics.

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://trafffi.ru/123?utm_term=lenovo+moto+tab+tb-x704a+charger PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pisik/week_of_peace_things_fall_apart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6109c64f-8331-47dd-8d9d-ede44c1fe0ff/stryker_t2_femoral_nail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d29b77-0efe-4732-bee2-5810ac24fd98/libros_de_osho_para_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/doa_surat_al_waqiah_latin.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/malt_liquor_vs_beer_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e27844ad-464a-47a3-8541-6a746e637d97/xixogugedebukamerozezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf452a50-e0b0-4297-a6bc-b5895d087ae3/rebilegu.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/zesuvonuxuziwa.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/tuxogovikixuposo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6596742b-9f3c-4e13-a7ed-8b8fc64bcfdb/mukajumu.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/florida_virtual_flex_courses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39ba8c6-dd91-4685-834e-fd2c6c2fefb8/8829784878.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16b4168612547ed61cedd/t/5fc5ac933c6ccf69f3230c0f/1606790292755/poo_tee_weet_in_slaughterhouse_five.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_off0000be6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6E 5552 bytes
SHA-256: 7f26c7a10419c34baea6e23027889ada640f32ee44b4375c4dc2dcfc7ad46f10
font_01_sfnt_off0000d147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD147 10912 bytes
SHA-256: ff224d90e99cf8a86fb22d32f4457c2f1f60895c8429e471e818c6aeb0e663b1