Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5e1d775042b261…

MALICIOUS

PDF

73.9 KB Created: 2021-01-16 19:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ce9995e9f2df9add8a8afaa6bc20f4b2 SHA-1: 6bb1b6457b9410c2920bef1f3028a11cdaaab80c SHA-256: 9d5e1d775042b26131606ffa8564aa526600d2d6cfffd6b6ccf5bd5e67fb5291
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/2099792.pdf.
  • 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://traffset.ru/123?utm_term=holt+physics+electric+forces+and+fields+concept+review+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424400/normal_5fa3c04fe6499.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/2099792.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/0haA4Hi/65216972490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5feb0b2ee1033.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/7443485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5fd8583773d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/gieZHTd/guided_meditation_for_stress_script.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5ffbbd8723bae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/chatal_band_song_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/aradhana_bengali_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/el_paso_texas_traffic_warrant_search.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/create_date_format_from_string_php.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 5248 bytes
SHA-256: 144210c765f3c424bc850b424528f981f6ba6a0dedf847ce2d6f4b58097b6ad5
font_01_sfnt_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 10560 bytes
SHA-256: 9aa855f430631803d0caeea6fad8eb31cd6686dea15ca470d333b5891da40694
font_02_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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