Malicious PDF — malware analysis report

Static analysis result for SHA-256 014c144e3b4bd1fa…

MALICIOUS

PDF

77.5 KB Created: 2021-03-06 18:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5f77c053352d2017dbf48cb017a74640 SHA-1: b77eeb7206855b605ceab9f84d30b88d8059c067 SHA-256: 014c144e3b4bd1fa838b2db264a21be2161d9aedb137d5c3a36ef5ed1fb0ce18
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to technical manuals, aligning with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic.

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://leonvi.ru/wix?keyword=olympus+bx40+manual PDF link annotation
    • http://fusekimutoxi.sportsontheweb.net/pitujumukomiviw.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/ravewitiwetobevuvor.pdfIn PDF document text
    • http://workmonster.net/calligraphy_printable_templatescssi9.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/iJEhfgc/3d_origami_dragon_tutorial.pdfIn PDF document text
    • http://vinograd.io/87352778409euvkl.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/bid3GLN/jotupapebalazelojipodax.pdfIn PDF document text
    • http://robertferrell.net/d_link_dir_615_troubleshootingbzamo.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/fofitakadikuvobitopop.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/f3b2d786-680b-46b0-bf90-381c602672dd/to_eliminate_deferment_abuses_what_did_the_selective_service_system_do.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_159bddc7d2054627aa5479ea45aea670.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/273b6beb-4f2b-43c5-b4b8-78419c516f44/16553290749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8cca4a-1a4e-4f4a-9989-31689b99eb6f/will_there_be_a_allegiant_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e054d77-1adb-433b-9cf8-8dca87b63292/65589937591.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_1d03f0d4279d4f5da66b26b94e22d640.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_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 5436 bytes
SHA-256: 39120e5d880c23afeb201a7d707a7f54192c59a546e1ba9f88d7d7d05984664e
font_01_sfnt_off00010512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10512 10660 bytes
SHA-256: 8f1a92d0e3043704a509a9b44318fb0792d6c6f1c0305baa5fe139f99d5f9302

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