Malicious PDF — malware analysis report

Static analysis result for SHA-256 712a487a1b2bcf9a…

MALICIOUS

PDF

66.4 KB Created: 2021-03-04 17:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6bbf97f47830ea3e54420d88ea2d0f38 SHA-1: 907a2a307586f06938f6a4df3f27cdf422b86e50 SHA-256: 712a487a1b2bcf9a335708b56f901a61d7bdd75894ed14da5f0aee48a09ad75e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://crophysi.ru/123?utm_term=niv+life+application+study+bible+third+edition+leather PDF link annotation
    • http://idealicaitalia.website/18146821495vygom.pdfIn PDF document text
    • http://obzorov.site/papabagillzvgg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5fc7b96c815d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420589/normal_5fee2be9b8f16.pdfIn PDF document text
    • http://bloomwithdeanna.com/heartstrings_dolly_parton_songswd1me.pdfIn PDF document text
    • https://xaledojasuk.weebly.com/uploads/1/3/0/9/130969600/tuxiwotalojuno.pdfIn PDF document text
    • http://natlegend.space/apa_format_website_organizationp74yd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_602385bf997ca.pdfIn PDF document text
    • http://redtea.space/nitoginogobx20hf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_6026acac69a73.pdfIn PDF document text
    • http://kindraretterath.com/912614705963y685.pdfIn PDF document text
    • https://ninuwekij.weebly.com/uploads/1/3/4/6/134625354/mawokilosuk.pdfIn PDF document text
    • http://bitsracing.net/101562526222juzl.pdfIn PDF document text
    • http://hushseo.online/focusrite_scarlett_6i6_driver_macig0st.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/cadce0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_f4f903edfeaf4ad0ad81274f632162c4.pdf?index=trueIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_fa0ed26674854f9696b7b631950d9507.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/zusogakajamujupukoj.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/zumenamubutuwizu.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_1cc8b1442c91452e94db9b28a815c39c.pdf?index=trueIn PDF document text
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_e7086228a313495899ae2660738980e8.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_off0000c599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC599 5516 bytes
SHA-256: 466523290da14cf5224362120c95d848ed5dd82c04ca4c7be50cc05076d9a032
font_01_sfnt_off0000d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD860 10452 bytes
SHA-256: 5cff22835c613994e3eaf62c16ed9b6f3ae567710e74eacb894d81180b9efc76

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