Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6e3586b4a8c8e1…

MALICIOUS

PDF

72.8 KB Created: 2021-04-12 01:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7cf8e05fd11c0f45b554316755a67dd3 SHA-1: 500afca6dc4068bd62157902677b795139efadf1 SHA-256: ae6e3586b4a8c8e1e2138c1ef9a10f77ed911004c896fd9c31c37a58a6a79af1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, with one identified as a malicious phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=sigma+500+bike+computer+instructions PDF link annotation
    • http://fomilexavekol.22web.org/algorithms_in_a_nutshell_2nd.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/janAOih/guns_roses_ringtones_free.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/92663369079.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/raluw.pdfIn PDF document text
    • https://cdn.sqhk.co/bidamasegom/icXogfY/58020876033.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/57716730872.pdfIn PDF document text
    • http://piludid.22web.org/tizagimavozeg.pdfIn PDF document text
    • https://cdn.sqhk.co/negolura/djcrcRd/pafopunusikudazovonot.pdfIn PDF document text
    • http://vawabipoxe.sportsontheweb.net/antibiotic_essentials_2020_download.pdfIn PDF document text
    • http://zupulunopefiwem.22web.org/putusupawunabuwajopexomo.pdfIn PDF document text
    • http://vinuwosozo.iblogger.org/nothing_but_the_blood_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/7SP5Y29/parent_portal_pisd.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/4YhbghR/phoenix_force_pro_scooter_black_neon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vemevusakeke.epizy.com/98772472638.pdfIn PDF document text
    • http://mawesawikatunus.epizy.com/vojatomitus.pdfIn PDF document text
    • http://fusaxisedafi.rf.gd/jonofuzinijosajow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e92649d-a4bb-49dc-b0f7-6ef3954bebfc/black_and_decker_edge_hog_blade_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8677327-9e09-42fd-99d2-014ee82c3061/honda_rebel_300_price_in_usa.pdfIn PDF document text
    • http://mifaropofim.epizy.com/39386574148.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 5792 bytes
SHA-256: b2c2e537047690b9779af4d4be4a6d151e0ca5bbf5a179b97b233ec3929a6277
font_01_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 10876 bytes
SHA-256: fb9ee98a0d42f09fd3346d15af3e6c4ca47dc1212b03113f701dd2537ec1a47a

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