Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcfe8dfd0af40a2…

MALICIOUS

PDF

87.1 KB Created: 2021-03-24 19:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 56acdcb97793ff0c42ed7d8916a9c41e SHA-1: ef6fe933beb8885f24471996e0f24aa64cf6be21 SHA-256: fbcfe8dfd0af40a25e75580c1dec7342e37f765feca231bec2afaf0b2335f67e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing page. The document body, though heavily obfuscated, suggests a lure related to 'wireless cctv system pdf'.

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://midufefew.ru/award?keyword=wireless+cctv+system+pdf PDF link annotation
    • https://lozepexowazabi.weebly.com/uploads/1/3/1/4/131409761/4365984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_602e0cb3c4399.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/dupatetakadij.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/lefepak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489848/normal_603a61c514b90.pdfIn PDF document text
    • https://mokadipubozot.weebly.com/uploads/1/3/2/3/132303064/8637663.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/17682472178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_60126c4749d83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_13c977596c5d42c09ef8687cd84d6ef2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/causative_have_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/bses_rajdhani_bill_online.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_7616e1587b1e4779847272d7ed900ca1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/concise_idiosyncratic_gapped_alignment_report.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/centrifugal_compressor_calculations.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/3225459510.pdfIn PDF document text
    • https://99f07d18-f615-4afc-a518-2230828c2232.filesusr.com/ugd/4cd51e_f2840cafbefd4eafa44c11064d74cdca.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_4498a496aa2e49f2b51f421e283aa10a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/pefuxoguzawezofonusubu.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/who_invented_blow_up_dolls_snopes.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/negizotokumomumapiwaxova.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_off0001159b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159B 5268 bytes
SHA-256: 91046033e7ba392513168905500dd7fe55173fddad6e754620252612f972cf8e
font_01_sfnt_off0001278a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278A 11664 bytes
SHA-256: 3c0aaef38bd63f97735e87adef9f828c9606db7a02b81db408d033f5d9de5972

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