Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a0c5609383ded7…

MALICIOUS

PDF

70.9 KB Created: 2021-02-23 23:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 585ba9e1fb13ed1d7631d5df15a0772d SHA-1: ea4c82bc88b63dcd1b015d30f84c0d688cdede89 SHA-256: 61a0c5609383ded78c0d79b7bc3e3ed36ea2522d25b8966577f6afb0c81ec40c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'seumenha.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose. No scripts were extracted, but the presence of external URIs and the malicious verdict strongly suggest a phishing or downloader attack pattern.

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://seumenha.ru/strik?utm_term=que+es+un+aprendizaje+esperado+en+educacion+preescolar PDF link annotation
    • https://cdn.sqhk.co/woledibiroju/f3ichdq/can_t_write_notes_on_iphone.pdfIn PDF document text
    • http://fenellalucynelle.info/battery_saver_pro_2019_frees35m2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5feb68061bcf4.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/gChayhf/kibekumukepitozugig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444366/normal_6008bfa6cac77.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/KhbVja7/nixekeluzebanegixufu.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/najewonaginu_xiwil_tobajemipi_gunegaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471092/normal_5fee10e87ffeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_602c49b581fa5.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/jhbiigd/georgia_natural_gas_payment_online.pdfIn PDF document text
    • https://pimipile.weebly.com/uploads/1/3/4/8/134883166/28057e00.pdfIn PDF document text
    • https://cdn.sqhk.co/timugulirebu/Gihz1WA/oscar_health_insurance_florida_providers.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/kufazete/la_metamorfosis_de_una_madre_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/icloud_activation_bypass_tool_v1._4_cracked.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_off0000d6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D3 5252 bytes
SHA-256: 86ebb3a0f36818bda22505f8338c5aa298ede207388678e49c577211bea7881a
font_01_sfnt_off0000e8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 10972 bytes
SHA-256: 870ac59376ecc4e1b98adc62764e67fd5cf33a2e1ac139996682e74933cc9bcf

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