Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dee8c89168ab10…

MALICIOUS

PDF

75.7 KB Created: 2021-03-30 07:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9438dd7e2ef89b9322afa6b124625b2b SHA-1: 80666a475ee33526a2ffe9322105fd6fc1e7c4bc SHA-256: f8dee8c89168ab1022d7607e05d3c650590a7877002ef4fd23d4ff796c21c6f5
156 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. 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
  • 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.
  • 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://soxebez.ru/wix?keyword=juan+carlos+hatchondo+indiana+university PDF link annotation
    • https://wajigigo.weebly.com/uploads/1/3/4/5/134588105/4501078.pdfIn PDF document text
    • https://cdn.sqhk.co/nisavivurefu/hdXgjbh/bermudan_swaption_term_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/ghgehar/mutizepediti.pdfIn PDF document text
    • https://febavezexiwajo.weebly.com/uploads/1/3/4/7/134703432/gikewan.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/bEdhecj/silvercloud_byu_login.pdfIn PDF document text
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/2431204.pdfIn PDF document text
    • https://cdn.sqhk.co/butixasa/oiejckS/beethoven_fur_elise_ringtone.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/widiku/corningware_slow_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/7726677169.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/challenging_7th_grade_math_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/virutukopal.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/22679273634.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/4483967016.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/38966181982.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/materi_biologi_sma_kelas_x.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/34851948634.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/how_to_use_p_touch_1000_label_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/guidecraft_dress_up_station.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/kozewedefuxaver.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/47904795204.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/xoruvafapovefugimugi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 5176 bytes
SHA-256: 91d3cc7b6fa5830965dd3a0b4034e868881daeee71895b1bf383985e250cbf35
font_01_sfnt_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 10996 bytes
SHA-256: 928d506ae85649342a28bff9fc43f8381a175444d08bf377409d527de35c49df

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