Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f2916327e6287d…

MALICIOUS

PDF

67.3 KB Created: 2021-06-12 10:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1c549d6c9ce78e45d8137eb419b1dafa SHA-1: 0b87edefbb85cf131b7d0faddecde0fba73e20f6 SHA-256: 29f2916327e6287d11c0b0f67ff7c5fcb5d5799d0d5b8e3e9657565d15e4bed7
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 0.9992

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://philabc.ru/pbw?utm_term=159r+bus+schedule+nj+transit+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495392/normal_5ffb7bf0233fc.pdfIn PDF document text
    • https://dobumixil.weebly.com/uploads/1/3/0/7/130738680/402673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_603d1e9517273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_60355fb1e02d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_601a55e413056.pdfIn PDF document text
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/34374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_606acb83c4033.pdfIn PDF document text
    • https://mepovokure.weebly.com/uploads/1/3/0/9/130969824/binigixas_tenodutaso_xotepodexopirob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pewudomame.pbworks.com/f/47721878181.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144435699/17741318745.pdfIn PDF document text
    • http://mujusevo.pbworks.com/f/naruto_kizuna_drive_ppsspp.pdfIn PDF document text
    • http://lomubel.pbworks.com/w/file/fetch/144964848/28881638042.pdfIn PDF document text
    • http://luwolozibiva.pbworks.com/w/file/fetch/145098828/jixezasimelokakidabakas.pdfIn PDF document text
    • http://zekapotog.pbworks.com/w/file/fetch/145093335/wetujelegifolofojefoxobiw.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/the_legend_of_zelda_a_link_to_the_past_gba_vs_snes.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144654729/77902587259.pdfIn PDF document text
    • http://gazidog.pbworks.com/f/68171285760.pdfIn PDF document text
    • http://lamedivu.pbworks.com/w/file/fetch/144665691/lubafetorelabesudizirowos.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144415641/what_is_vrv_air_conditioning_system.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144426747/20112502917.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144619068/65516416351.pdfIn PDF document text
    • http://gabumur.pbworks.com/w/file/fetch/144932313/bopafibodinonisepofolaku.pdfIn PDF document text
    • http://fifekapem.pbworks.com/w/file/fetch/145063578/78171845183.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_off0000ca5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5A 5696 bytes
SHA-256: c9f3947d339c1f12378cc0c70d55a9ef47383a8dc7f4de4d334382c157a4ee45
font_01_sfnt_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 9872 bytes
SHA-256: 3d5e97cdffca41f38427551486ae899b94fda638edd94aaa8c93169f4c66680e

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