Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc36077ffae9059b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-25 08:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 966927207a7f1773147584e904465cd2 SHA-1: 215aebf176e3ad3a50e06c1404f9b20d289fa276 SHA-256: bc36077ffae9059b91f94ed6420cbd0f895fb7d189d8dd95d56314506bc8d266
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities or employing social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=psychology+books+to+read+before+uni PDF link annotation
    • https://cdn.sqhk.co/zoburawava/9GLhex8/soregenajobejuvumudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fd8fa0c8105b.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/dQjxIQN/editor_de_video_movie_maker_para_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/difejekexe/bgfhbhj/battle_royale_wallpapers.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/how_to_set_a_timex_ironman.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453528/normal_5fc649bce4503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_60272cf91635c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414677/normal_5ffb9028cc3b0.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/77304399349.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/saxeroz.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/voletaxujiruwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3182e56-c241-4d5a-8739-446bea69cd08/52589687543.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/17224309653.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/liripukukoxikok.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/lusozudimowaxukuw.pdfIn PDF document text
    • http://remamezela.rf.gd/fiwevumuruzajow.pdfIn PDF document text
    • http://zivumimilalak.rf.gd/sql_query_interview_questions_for_experienced_professionals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdd6337-6408-4a75-88d6-30531456eaaa/35908167067.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/fapakarap.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/78165044510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea79df8-d1d8-4ec3-ab0c-121991d58a2a/46034432238.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/ardex_k15.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_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 5592 bytes
SHA-256: dd43d66320e9bf69730132d915621b912900ee2df0d0606bacbf6cee9982d03e
font_01_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 10212 bytes
SHA-256: ade1a8be3fe76659fa383eb948a00f702b1632f992fa89b6b4c9b77a2503947e

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