Malicious PDF — malware analysis report

Static analysis result for SHA-256 f063c37e2ddf2f5e…

MALICIOUS

PDF

72.5 KB Created: 2021-02-14 10:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3bc5d8c561e6496668d2b8e703501086 SHA-1: 22aedabf9ec769727f7d8daeb9abd82a6b7c9ba4 SHA-256: f063c37e2ddf2f5e52e9680dc7c1ccbfe5b4a68b410868167b6100b4fb7c9e7c
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=invite+list+excel+template PDF link annotation
    • http://joy-todays.online/guwodenijibadpqfdv.pdfIn PDF document text
    • http://policyhelpcenter.com/52680819143edwx9.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/fghijji/20441790729.pdfIn PDF document text
    • http://belldiscount.ru/pokogalexepekufipoboparpyc1.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/custom_action_bar_android_kotlin.pdfIn PDF document text
    • http://leree6.club/semiologia_porto_7_ediC3A7C3A3oy2auh.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/osZgiib/tobeco_super_tank_0._5_coil_wattage.pdfIn PDF document text
    • https://xetamoro.weebly.com/uploads/1/3/2/8/132815737/71a116e50e6f6.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/jezaxojipevu/have_got_questions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/zegafomotef.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/tangledeep_pet_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/44219243589.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/tinulubugurawetadomidapa.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/l380_adjustment_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/mikagowerizuzibofuju.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/mpf102_jfet_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/36659680399.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_off0000d23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 4724 bytes
SHA-256: bb95aa87d248850e864518f86717eace382fe563fec522c602e540937f6b05d0
font_01_sfnt_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 10752 bytes
SHA-256: de8639f85514f1a39d19039e87e0c710a1f84fc0880e58e031081f398234faaa
font_02_sfnt_off000106d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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