Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fc9472902db6d2…

MALICIOUS

PDF

88.5 KB Created: 2021-02-25 10:56:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02fff0a69b4775a88ded309e75a835cf SHA-1: b53b09503b89c69b5a6c2b97e34982a0c413e3e4 SHA-256: 54fc9472902db6d2c2f61a3af053448c6d4be4986e868be9477121fecb0ab914
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 0.9998

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://jottigo.ru/123?utm_term=the+maze+runner+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443337/normal_6021ffb558972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457011/normal_5fe3aecbd3798.pdfIn PDF document text
    • http://center-san.ru/466843840937x3qg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_601b526fe3490.pdfIn PDF document text
    • http://tehnopolis.org/893798127644b96.pdfIn PDF document text
    • http://tasefuvakol.22web.org/parenting_stress_scale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488580/normal_5ff9addebf8d7.pdfIn PDF document text
    • http://strahuemsya.info/xugemuzimiw4h7lv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_601e72dd54522.pdfIn PDF document text
    • http://excschool.ru/lizorivuvujdxi2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481271/normal_5fe963f96348e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_5fd78e6bb31f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_6034951161c3a.pdfIn PDF document text
    • http:///\\\/twitter.com\\\/MowersDirect\,\icon\:\icon-twitter\,\title\:\Twitter\},\Pinterest\In PDF document text
    • http:///\\\/pinterest.com\\\/mowersdirect\\\/\,\icon\:\icon-pinterest\,\title\:\Pinterest\},\YouTube\:{\href\:\https:\\\/\\\/www.youtube.com\\\/user\\\/MowersDirect\\\/\,\icon\:\icon-youtube\,\title\:\YouTube\},\Instagram\:{\href\:\https:\\\/\\\/www.instagram.com\\\/powerequipmentdirect\\\/\,\icon\:\icon-In PDF document text
    • http:///\/www.bbb.org\/chicago\/business-reviews\/industrial-equipment-and-supplies\/power-equipment-direct-in-bolingbrook-il-57001088,title:MowersIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zexelebisitod.epizy.com/examples_of_contingent_liabilities_in_balance_sheet.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/how_do_i_update_my_garmin_nuvi_2595_gps.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/pes_manual_usmc_2018.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_off00011918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 4980 bytes
SHA-256: 9b66a1b42db1c13ccbe8174e3e8e82b07a3ee6114d4fcb1f5fc59bf28488f9fe
font_01_sfnt_off000129ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129ED 13052 bytes
SHA-256: 0c244dfb7e72db04468596fcb3882b40a658917ed22b976ebe738ead315dd6de

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