Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b776481da84f4b…

MALICIOUS

PDF

77.5 KB Created: 2021-04-04 15:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2e12d27768a4b653d6eef3c441e18085 SHA-1: b3382520e552b122da431013d896f14282c9c787 SHA-256: b9b776481da84f4b818869cd89e23a07fdb3da05de7ec034f3d83bd64a100fab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'Ford puma manual hybrid', directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=ford+puma+manual+hybrid PDF link annotation
    • http://lnstagram-verificationbadgeform.com/destro_warlock_pvp_guide_8._2rmglt.pdfIn PDF document text
    • https://cdn.sqhk.co/simosukolevo/371g54v/91355254810.pdfIn PDF document text
    • http://biditudoti.22web.org/tumutepowegufudi.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/Subo3id/11144671021.pdfIn PDF document text
    • https://cdn.sqhk.co/kisilusotuke/HRfYOhi/big_fat_adventure_2d_platformer_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/oWheheW/universe_sandbox_2_buy_online.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/ezXjia2/48223273297.pdfIn PDF document text
    • http://ighelpcenter.xyz/rca_rtd317w_manualvl4yw.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/khgLhii/suladonisuxef.pdfIn PDF document text
    • http://tortomsk.ru/financial_statement_analysis_project_report_for_mbapypaq.pdfIn PDF document text
    • http://wide-take.top/how_do_i_fix_my_laptop_operating_system_not_foundt2om4.pdfIn PDF document text
    • http://kemytbok.xyz/32025981835aonw1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b34b9453-3271-4df7-a313-00b805663486/64736479616.pdfIn PDF document text
    • http://parijuxurumemew.epizy.com/merge_online_free_100mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad70897-a904-4cb8-81be-18b362495904/pudezojelov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3235a651-4a44-493b-824a-fedb911574df/beowulf_si_grendel_film_online_subtitrat_in_romana.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 4904 bytes
SHA-256: e41373a773882e39bd45ced50be075b4a7de9be4d698890ebfba34503902bdcc
font_01_sfnt_off0000f42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42B 10752 bytes
SHA-256: f08b09f8187876462d6b6196b92989b88da7b3e4de6f79f810f2be49e1850642
font_02_sfnt_off000118f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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