Malicious PDF — malware analysis report

Static analysis result for SHA-256 77619f9b28e479fb…

MALICIOUS

PDF

75.0 KB Created: 2021-03-18 03:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6295da1047373e987b8647f8688f9ab SHA-1: 9ebc4ecbc12bff01e64e0bc73d6198ac9fe255b7 SHA-256: 77619f9b28e479fb205b0829162c0a959df11733a643f9bec359436eb4920ae6
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=aether+elemental+pathfinder PDF link annotation
    • http://opt15.ru/vulogeb7thus.pdfIn PDF document text
    • http://erse.xyz/harry_potter_und_der_stein_der_weisen_pc_spiel_download_deutschhss8u.pdfIn PDF document text
    • http://bebarupeludif.22web.org/ask._fm_apk_free.pdfIn PDF document text
    • http://remebetegekit.iblogger.org/wilton_wedding_cake_cutting_guide.pdfIn PDF document text
    • https://katokilewiwimi.weebly.com/uploads/1/3/4/8/134846457/mabuxe-pakaganas-pakekulojid-finusavo.pdfIn PDF document text
    • https://senevabitup.weebly.com/uploads/1/3/4/2/134234896/1477908.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/mefonevimimix/goliath_season_3_review_hollywood_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/citizen_eco-drive_rose_gold_chronograph_ladies_watch_fb1153-59a.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/atlassian_confluence_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/80389839856.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/32338313823.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/52962383196.pdfIn PDF document text
    • http://wibekemuxeni.epizy.com/l_adjectif_qualificatif_pithte_exercices.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/excel_view_different_sheets_side_by_side.pdfIn PDF document text
    • http://zuwopun.rf.gd/dugabodoxinolixesapux.pdfIn PDF document text
    • http://xutigefogapu.epizy.com/gekaxabodaruvolexaligug.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/palliative_care_coding_guidelines_2018.pdfIn PDF document text
    • http://feduneve.rf.gd/10692830109.pdfIn PDF document text
    • http://tesuzegijibonu.epizy.com/roasted_vegetables_and_chicken_sheet_pan.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_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 5092 bytes
SHA-256: 5b59d1f8ad7038f92c38e89374ba6011d76f72fecce247e6c2e64f2dea15f510
font_01_sfnt_off0000fbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 10432 bytes
SHA-256: 49f6eb3f3285831771634b9facfbd28bc99ad694b0187007433f33b4100169bd

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