Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1300d025f2349a…

MALICIOUS

PDF

79.9 KB Created: 2021-06-09 23:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 173a254bbf2373f1cc24cf8bfac717c4 SHA-1: f4840490fc6765b857c5ab735ffe1dbb3b370893 SHA-256: 1e1300d025f2349a78cf3d1133961b3bc673609cbeb92d0d112c378ef8cdf3be
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) 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 0.9998

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/pbw?utm_term=the+future+is+wild+200+million+years PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394079/normal_605ee6d48cace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_60552fe2a76d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_603d7c8571803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_602f9452dbcc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412379/normal_5ffd58acd0ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_603c48c2e1e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447250/normal_600df02c9f6a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9787546a-370f-46eb-9801-b40a34213841/ibm_maximo_asset_management_7_5_fundamentals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90065c3a-f333-49c0-b202-894df72f8866/05_dodge_dakota_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2108565b-06e4-431c-8115-bdc9840e3793/how_much_do_interior_designers_make_in_austin_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5eb0f3-bd55-4814-b4c2-260efce179e4/kinixa.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/w/file/fetch/144678459/zilajiligofudazosen.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144435486/malaysia_tourism_statistics_2020.pdfIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144637092/how_to_use_a_canon_mp11dx_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca10a665-6a68-408a-b0fe-8fddb2f5410d/16509823312.pdfIn PDF document text
    • http://pozapagula.pbworks.com/f/47948871200.pdfIn PDF document text
    • http://bezidoxumoru.pbworks.com/w/file/fetch/144744219/fibavogeginabemeroteli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dad9e44-d8b1-46ac-a824-8fe4b90c4c8b/tegiwupax.pdfIn PDF document text
    • http://wirajudukim.pbworks.com/w/file/fetch/144841551/calendario_2020_escolar_2021_sep_estado_de_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2718446-7f00-417a-998f-a5ce32ceb869/how_to_open_currency_exchange_in_india.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_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 5564 bytes
SHA-256: 0ede820bc6e63ab664571108c30a29ea95d13234dbd88e849a68adcef2e3ccdd
font_01_sfnt_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 10348 bytes
SHA-256: 94f91d3f11d81d6827998b49b018bf21095106198be9c2d126de20765d8664c8

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