Malicious PDF — malware analysis report

Static analysis result for SHA-256 e321bad53b7b2a1f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-24 20:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aa2ebbf7271b05abb3b5f9a40c933068 SHA-1: bd4cb79006de38ff39babc9a4360cc806a3260f6 SHA-256: e321bad53b7b2a1f8c59721e20e49e8fea2daba6430a7b19261dc97d9388b087
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious PDF designed to redirect users to potentially harmful sites.

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://resalured.ru/strik?utm_term=la+la+land+stream+online+free PDF link annotation
    • https://natatujefeni.weebly.com/uploads/1/3/1/6/131607075/f25dc.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/9eb924f6aa6a86a.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/how_do_i_clean_my_cuisinart_14_cup_coffee_makerz567c.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/totokupegogevunagafepu.pdfIn PDF document text
    • https://cdn.sqhk.co/gixirunizem/ichc8Ud/raxaxoxibababav.pdfIn PDF document text
    • https://cdn.sqhk.co/jatizaru/bjjUjbk/43470798929.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/20b5a7dcc2ee.pdfIn PDF document text
    • https://cdn.sqhk.co/kibuluke/VWjcKnX/sinusitis_frontal_tratamiento.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/jicljiP/league_of_legends_evelynn_probuilds.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/7548019.pdfIn PDF document text
    • https://cdn.sqhk.co/biserodafed/LDEhcqt/31093410209.pdfIn PDF document text
    • http://damvglaz0.xyz/leg_flexibility_exercises_for_dancersk62hi.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/arabic_malayalam_yaseen.pdfIn PDF document text
    • http://laitlabs.pro/kit_logo_barcelona_dlsmr6rl.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/tugari_xijaxulog.pdfIn PDF document text
    • http://zikevamakag.mygamesonline.org/how_to_program_a_samsung_remote_ak59.pdfIn PDF document text
    • https://daluruxixofofi.weebly.com/uploads/1/3/1/3/131398394/dajujajigored_wefewukosemija_sitapekuromawaj.pdfIn PDF document text
    • http://connexion-amelii.xyz/cad_2010_keygen_freeoouq6.pdfIn PDF document text
    • https://bugupomulu.weebly.com/uploads/1/3/5/3/135396692/fevobilegib_mevitola_tekasumelivabi_dekemonudal.pdfIn PDF document text
    • https://gamunodeda.weebly.com/uploads/1/3/4/7/134765824/perotawi-vuzaba-xazozivu-zomotoxikagaduk.pdfIn PDF document text
    • http://3bki.ru/72663980784of3bg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabejanaboz.atwebpages.com/review_innovations_passing_rate.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/36207598800.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_off0000f7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EE 4992 bytes
SHA-256: 1db725dd71ba8c6ab7715a5a2f89f5c7c0da43faa579e07a189e720c18f096fe
font_01_sfnt_off000108d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D2 12096 bytes
SHA-256: a65a8a9d82f79e5d3bbd8436226487b19930fdd4f473dfba6d795754ebb04f59

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