Malicious PDF — malware analysis report

Static analysis result for SHA-256 8711ab55e5cb4579…

MALICIOUS

PDF

72.0 KB Created: 2021-03-30 00:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 37b9a9dd6f2749b9293751a76b74e052 SHA-1: b7df69661b133e261dfc762d4553589675b53975 SHA-256: 8711ab55e5cb45796beb084d5078941f894ea32bdddf954fe6b3355736cec0a9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of the URL 'https://maypoin.ru/123?utm_term=itc+bookman+demi+bold+font+free' suggests a lure related to fonts, aiming to redirect users to a malicious site.

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://maypoin.ru/123?utm_term=itc+bookman+demi+bold+font+free PDF link annotation
    • http://beliyden.xyz/2017_hyundai_sonata_owners_manualqxxmd.pdfIn PDF document text
    • http://seplafond.xyz/12978220570p4waq.pdfIn PDF document text
    • http://riwuvodobopexu.mywebcommunity.org/class_ab_audio_amplifier.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/automotive_service_manuals.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/79553054307.pdfIn PDF document text
    • http://xanevejesofag.mygamesonline.org/dowavudosefewiluzamola.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/52082660626.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/laporan_pendahuluan_orchitis.pdfIn PDF document text
    • http://palopepidek.mypressonline.com/schwinn_bike_trailer_coupler_canada.pdfIn PDF document text
    • http://fresh-ita.space/cube_testing_formulaqojja.pdfIn PDF document text
    • http://idealica-ufficiale.site/737938663219hs1j.pdfIn PDF document text
    • http://opensalon.xyz/39919817995pdf2r.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/mexoposuwu.pdfIn PDF document text
    • http://carishr.com/kuta_worksheets_integers9yl0n.pdfIn PDF document text
    • http://chistohome.moscow/kenneth_cole_reaction_watch_reviewiqv1i.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/1b34e4d9-bbd9-47b4-8b24-904ba002c466/37299359998.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/how_to_hook_xfinity_cable_box_to_tv.pdfIn PDF document text
    • http://segimoto.myartsonline.com/xakejadugele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fbee8b-a703-41c6-9a46-5080b81d6552/how_do_i_connect_my_facebook_portal_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d261a0b1-d481-4d5b-a702-97f23ced75a0/sodastream_canister_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af454003-38d6-4d59-8f0b-bc5b5dc7a078/68058064649.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_off0000d3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EE 5128 bytes
SHA-256: e54ce6714634d68b7ee8674cc5efa627b63c2c7652af40efb6a126093104cd50
font_01_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 13640 bytes
SHA-256: 3edd057d75cbe76330f5fed4a413fba20577def6ca068bb3a09a638c08a79a6e

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