Malicious PDF — malware analysis report

Static analysis result for SHA-256 e580de5ca606a3f8…

MALICIOUS

PDF

82.1 KB Created: 2021-03-14 08:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f6a29e9b778abdfe28d8f7f9da375fdc SHA-1: 529df1d23f14362525d31ae2bdedd0a7cc7d3d56 SHA-256: e580de5ca606a3f8a94b4d12c120f559413f6186c347f575ef191558d00514ae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm pattern, suggesting an attempt to distribute malware or phish for credentials. The presence of external URIs and the link farm heuristic indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=acdsee+free++with+crack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467910/normal_602f5d6ae5755.pdfIn PDF document text
    • http://myfavoritesun.xyz/dalutebipogiu8eqy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_600c9ba84f001.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/7607498533.pdfIn PDF document text
    • http://nujijaj.getenjoyment.net/rental_agreement_format_bangalore.pdfIn PDF document text
    • http://shopsupergood.site/bucaneras_negras_con_plataformaj4z58.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/international_journal_of_medical_sciences_and_current_research_pubmed.pdfIn PDF document text
    • http://drilltech.info/need_for_speed_no_limits_gold_hack_ios6968w.pdfIn PDF document text
    • http://trelon.fun/54845541954ce3us.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/tipos_de_mobiliario_de_archivo_de_oficina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_6017170631131.pdfIn PDF document text
    • http://giveaway2020.info/b2_bond_order45d90.pdfIn PDF document text
    • http://jetavof.sportsontheweb.net/12874452557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463551/normal_602ee8266063b.pdfIn PDF document text
    • http://mmmuuuue.space/602280925491im1o.pdfIn PDF document text
    • http://detonic-italia.website/zajanino2sdee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_026faa025c0845cbb7e998f299e4f642.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_fbafd17203474362b4944c199eba4e95.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_da294dccb97142589a7341097e7c7c16.pdf?index=trueIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/craftsman_garage_door_manual_release.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/biker_s_choice_catalog.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_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 5220 bytes
SHA-256: bf0aed426ccb5d96269635764bf0543b08a24d83a019102a3c78839ae0fc42cd
font_01_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00010718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 23280 bytes
SHA-256: f3353b053a06044eab489e8339025bf9aef11a42248fa3c0c1b4a96058c1ad24

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