Malicious PDF — malware analysis report

Static analysis result for SHA-256 a654b11ebfafdad7…

MALICIOUS

PDF

76.1 KB Created: 2021-02-27 18:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4087445ecc7eefd49682c1cac81d00eb SHA-1: e57a71821a7ee31470c903ac609cd0a8cbe128f0 SHA-256: a654b11ebfafdad70246d4748ffbd0301181f6da919afd943e9e130a56c37127
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is malicious and a phishing attempt. It embeds a URL that leads to a suspicious domain, likely to host a malicious payload or phishing page. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=what+jobs+do+data+scientists+do PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379035/normal_5fedba926e673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_60108f8dc4f9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fe5e5fc7fdc7.pdfIn PDF document text
    • https://vukibipodut.weebly.com/uploads/1/3/4/6/134690361/affea45077820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459469/normal_5fd63f80ca147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5fc795e3b2ff4.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/sanebuxaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425005/normal_5fe2aabca4ccb.pdfIn PDF document text
    • https://disezoken.weebly.com/uploads/1/3/5/3/135327633/46af37e3163a663.pdfIn PDF document text
    • https://zipifotudesa.weebly.com/uploads/1/3/0/9/130969604/a6027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_602501ed0b254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5fedbce9d734a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_5feb6d04237b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_6014cb9e63a88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415944/normal_6008029509c78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417049/normal_60369692a5466.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/loramowelugogasut.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/mamibis/street_fighter_4_apk_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/zepoxeder.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/23854677837.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/cameroon_visa_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/mcgraw_hill_education_geometry_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/4029975870.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_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 5128 bytes
SHA-256: 101d137ec6ce984025acd81198f333c7a34ab1ec9a8966a718898649de6f6583
font_01_sfnt_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 11396 bytes
SHA-256: 45fd6998030bd5a4803fbcfb54155121ae986cc8d3cac4c816652e052d857c65

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