Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b239f5efd319f5…

MALICIOUS

PDF

76.5 KB Created: 2021-03-05 03:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7b1703de93e5e7db451c21e05b617bcb SHA-1: 35a7a245d2a4a24b210778e8055045bcf2a2d870 SHA-256: 92b239f5efd319f5a9b29305e24078c23de6417a048d9977689e21a59e20dab9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to be a lure related to a product listing. The presence of an external URI and the overall detection by security tools strongly suggest a phishing or malware distribution attempt.

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://seumenha.ru/123?utm_term=memory+foam+pack+n+play+mattress+topper PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421339/normal_60368a7005709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_601236d1211e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446174/normal_5fedfa31d3471.pdfIn PDF document text
    • http://9gusevshop.space/52917385359ax23m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_5fc67713d1b5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452376/normal_6001905b25317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_6007373bc1dc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_5ff5cd1365b1c.pdfIn PDF document text
    • http://gravkamen.ru/dog_friendly_bubble_machine8ej1c.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/napisakaluja/addiction_procrastination_and_laziness_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e85a77-259a-4d62-a39b-a693ce340172/acido_perclorico_ecuacion_balanceada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d32bf05-e706-4613-a8af-a56ba0584aa9/yo_amo_a_juan_querendn_intro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16abba44-8ea5-46ce-aacc-76c2d059a3e1/xenapobam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc6b612-a148-40be-b4e3-820665f33335/frases_de_el_libro_100_aos_de_soledad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d23da3a-c669-457f-ac11-827d04f12e6e/english_grammar_basic_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/43372241048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc09adc-8ba6-4976-8311-9663c0298e83/koxupamagabujixomepurig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd9058e-3f13-41e3-995f-61d09ce5509a/245895668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9a130b-1e98-46e4-813a-41ce1eff6235/calendario_contribuyentes_especiales_2018_semanal.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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 5332 bytes
SHA-256: 24da99d59a466bc49a97c316dc439e05d3f4aa0bf9780cb9c2fe301bad9875af
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 11448 bytes
SHA-256: 3369df52497f109f329f26af997b72150e6e263d07e64671a3a26929a8ef30d2

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