Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb692813c4e849d…

MALICIOUS

PDF

73.8 KB Created: 2021-02-19 15:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ee329badd3230f90f251f61b59b43a3e SHA-1: 719efd42060e7eebe81aeb80766ac270fd5b695c SHA-256: fbb692813c4e849daf714192978791ffdb3ae4d4acde1492d5e06c58c4bb8238
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded content, though heavily obfuscated, suggests a lure related to 'Cosco portable high chair instructions'. The primary IOC is the external URL, which is likely used to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wb?keyword=cosco%20portable%20high%20chair%20instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5fdfffd84d7a3.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/ktahgjh/995107499.pdfIn PDF document text
    • http://hotita.fun/chevron_corporation_annual_report_201121hm9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_6023793d38098.pdfIn PDF document text
    • http://starkrobotics.org/54756853863caaqy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_601229d3078a1.pdfIn PDF document text
    • http://esclick.pro/366361127479vmkh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426676/normal_6015fc2557090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_5fee6325182b3.pdfIn PDF document text
    • http://gitamoravazini.22web.org/vajubita.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470542/normal_6009a2896d7ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472208/normal_5fdecacd9306a.pdfIn PDF document text
    • http://gosofimasuwemig.iblogger.org/bifimogibivojututaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453901/normal_5fc89b2f1d20d.pdfIn PDF document text
    • http://findssldz.xyz/jivujugigopusimez8l522.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://silagumurifexo.epizy.com/odia_mix_dj_song_2019.pdfIn PDF document text
    • http://pimeduzuruwoboj.rf.gd/tomozawesuxuvoxuvadi.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_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 5240 bytes
SHA-256: 47c69938730be3e4aa989c79069e7f1eaafd913d6aa01b73f9190002524586e1
font_01_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10752 bytes
SHA-256: cc38e3a8896d9c776f91307550b2fc8f3329f2fdcaad7c13066e257298090a46

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