Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0a870ed37109e4…

MALICIOUS

PDF

87.8 KB Created: 2021-03-22 22:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78198229d6045ee7d11a5cb165de54fd SHA-1: f12743fa635df8d4a09a3849dde5ee9a062ff49f SHA-256: 9e0a870ed37109e4444f6b4bd7ac4de9f231d0f138b5bb8985ded5092f5d3c1b
164 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an urgency-based lure. 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 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/wix?keyword=reclaim+your+creative+confidence+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444113/normal_603cbdbc4e2e4.pdfIn PDF document text
    • http://vixinusagodax.scienceontheweb.net/orlando_international_airport_map.pdfIn PDF document text
    • http://clientbluebadge.com/zuvexotutawuwefukuvidikux2r3gg.pdfIn PDF document text
    • http://carluxepaint.site/how_to_remove_insinkerator_555ss8i8bq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_604cc9ccbbac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_5fd7a9ea10995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_6045f96ee3a78.pdfIn PDF document text
    • http://moscow-siberian-force.online/2015_lexus_gx_460_price_newrewtc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_600b1311e6c9a.pdfIn PDF document text
    • http://gutprod.xyz/leaves_of_grass_by_walt_whitman_free_download9fql8.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/limepusotanal/why_is_corn_so_many_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/how_to_identify_like_terms_in_algebra.pdfIn PDF document text
    • https://1e2e1d2f-e5bc-406e-8ade-c93a3c5db6fe.filesusr.com/ugd/81c7be_32278108150743bf81d09323db779a90.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_e1da322aeb51443998f69c46fa1871d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozifep/iranian_embassy_siege_bbc_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/free_math_worksheets_converting_fractions_decimals_percents.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/niridovurugeme.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/helping_verbs_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/herbarium_sheet_size_in_inches.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/74276175211.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_3ff4f967d87b41339337217566d89db6.pdf?index=trueIn 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_off00011974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11974 5384 bytes
SHA-256: 081c3ff85e2784929d84f38526dccc160f36444df887043008bfd83e9a251b47
font_01_sfnt_off00012bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD8 11504 bytes
SHA-256: 0bf555f16384acb5cc41dea7faecad4e74b614d77b41b85b7f2356faf3e4dc6e

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