Malicious PDF — malware analysis report

Static analysis result for SHA-256 e087ddb745e08bf9…

MALICIOUS

PDF

65.3 KB Created: 2021-03-29 23:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef8afaf9dbffec5ef0093645fa802947 SHA-1: 59ca674d02b0a0dc52f251b08905ab7fa54d80e1 SHA-256: e087ddb745e08bf95d63b082082bf87bc9d6373db4267f6d2c722f77c0d5ec6d
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://kuzutuzo.ru/award?keyword=les+capitales+des+pays+pdf PDF link annotation
    • https://cdn.sqhk.co/dubikureta/Jhj8ieW/john_cena_fighters_championship_wwe_wallpaper_new.pdfIn PDF document text
    • http://about-central.com/literature_review_organization_template2b4r0.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/JhjCjjH/votalegatodimilijupo.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/7ghjfz5/high_volume_ringtones_download_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/L2OHgcG/extreme_drag_racing_mod_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_5fe7d119c8c05.pdfIn PDF document text
    • http://swiss-gear.shop/puzitumuw0f1gx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485569/normal_600292bf7cdc3.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/bipego35fcc.pdfIn PDF document text
    • http://copytoshka.ru/94288815248airap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fd16e32abb1e.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/GidaCCP/snapchat_stock_price_target.pdfIn PDF document text
    • http://icily.xyz/hypertension_guideline_thailand8unxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484990/normal_603b1bb50136c.pdfIn PDF document text
    • https://cdn.sqhk.co/bokupajokim/jC8sier/92789013218.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/consignas_adorno.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/96d07ac6-d060-4393-a1b5-36424d4d48a0/should_a_smoke_detector_have_a_green_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeabef63-69c1-4f57-a006-c246ba033784/fantastic_fan_rv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2cde99b-39e1-4ea7-979c-0095cc140e7a/linksys_wrt_ac1200_review.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/thoracic_back_pain_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00752ed-2b36-427d-93c8-11e43dbbc039/bumunaxiz.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_off0000c84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84D 5096 bytes
SHA-256: c071ed11285e34a70c99b8304801628b21712eba985a6ed06eaf94d00757015b
font_01_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 9188 bytes
SHA-256: 1b72db3b96b9f1376152e590b9c72104e44a65c7c16f9af08ac0d3c5e7c6e8ae

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