Malicious PDF — malware analysis report

Static analysis result for SHA-256 c456818d4d556cb7…

MALICIOUS

PDF

82.8 KB Created: 2021-03-13 21:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d5eb11085f2d7465852019ce5c7f41cb SHA-1: a88ef174ce256b90fcef229cba93e0f4bdb51f5a SHA-256: c456818d4d556cb705881bda8c9928ef8665848bc4d3a936805f2be5a2a53621
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. No scripts were extracted, but the presence of a suspicious external URI is a high-priority indicator.

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://crophysi.ru/strik?utm_term=greenworks+pressure+washer+1600+wont+turn+on PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383798/normal_6044748663b96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413977/normal_5ff06ccb54779.pdfIn PDF document text
    • http://wide-do.top/how_to_get_autocad_certificationta7p3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_6021f11fbd18f.pdfIn PDF document text
    • http://storeeuro.info/small_engine_repair_movie_where_to_watch38fic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5ff4da38ad2db.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/camscanner_pro_apk_cracked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500417/normal_5fec345ec25fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499972/normal_60065abb3301a.pdfIn PDF document text
    • http://mnogolidov.xyz/dbt_what_skills_mindfulnessh871v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fde09d64139d.pdfIn PDF document text
    • http://ductsunlimitedins.com/78593179430tev9i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_604a7607387d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/how_to_learn_calligraphy_easily.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/74226307476.pdfIn PDF document text
    • http://wutopow.epizy.com/nals_neonatal_advanced_life_support.pdfIn PDF document text
    • http://revisinek.epizy.com/how_to_draw_anime_female_head.pdfIn PDF document text
    • http://kaluzepo.rf.gd/50243940425.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/22511549132.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/66050948604.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 5244 bytes
SHA-256: cae68b1de2159c395b4ad9106b67fa414f9a6536b7f869629ed4c4c0178d2abe
font_01_sfnt_off00010a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 11068 bytes
SHA-256: 831dadd24a3628c32808492aae6d65e8aa19a9a834e2d129a6a29c39fdfcc0bd
font_02_sfnt_off00012f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F36 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c