Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f2b0d2400f57fa…

MALICIOUS

PDF

78.0 KB Created: 2021-01-24 10:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c98abe79b07731047a247c3d146f1321 SHA-1: afdd3dda46c130f1b5e1eaab8b103025cfe117f7 SHA-256: e3f2b0d2400f57fa7eaf685b5662bf40d59ab971308a88c61a289e020a4761a7
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating suspicious links and a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded URLs point towards a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://baarspo.ru/123?utm_term=donkey+kong+cartoon PDF link annotation
    • http://zemawage.22web.org/dodimiwogodigegabamu.pdfIn PDF document text
    • http://meinekarten.best/92709461674vrc8m.pdfIn PDF document text
    • http://auto-agents.space/vowonibeipihi.pdfIn PDF document text
    • http://tranquils.space/5702757066h567y.pdfIn PDF document text
    • http://tameenegypt.com/bekomaxerazorak5yn00.pdfIn PDF document text
    • http://ru-1.casa/gevoravuminifokikarit134p.pdfIn PDF document text
    • http://viwimewi.22web.org/62322170664.pdfIn PDF document text
    • http://zebrait.fun/tunnel_rush_unblocked_660qk8e.pdfIn PDF document text
    • http://com-login8.xyz/family_guy_quest_for_stuff_cheats_2018nfm1k.pdfIn PDF document text
    • http://cuzinfo.ru/591814520850w9jq.pdfIn PDF document text
    • http://lishop.site/46814786092ttjlk.pdfIn PDF document text
    • http://0fruits.space/helix_ball_onlinerejb4.pdfIn PDF document text
    • http://tesocoin.online/5707762077090cnm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidomag.epizy.com/guided_transmission_media_in_computer_networks_tutorialspoint.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/supasugofalulo.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/jemeruni.pdfIn PDF document text
    • http://xosumuzav.epizy.com/yakushima_hiking_guide.pdfIn PDF document text
    • http://lebevinawefebo.rf.gd/32981546160.pdfIn PDF document text
    • http://malinaliwul.epizy.com/2mm_plastic_sheet_bunnings.pdfIn PDF document text
    • http://begalokatixatu.epizy.com/ps2_cd_rom_games.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_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 4924 bytes
SHA-256: 59715e13d481afba6c6cec9004e128026cca8f47bdfac3b547032b54c79a4a12
font_01_sfnt_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 11020 bytes
SHA-256: ea3ba1d5d948de10f127985471cb34a2dfd2743054d7700ee27ffb5a18a9736a

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