Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfdde1a33151635…

MALICIOUS

PDF

79.1 KB Created: 2021-04-20 06:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0b397055a3369234bf9c6987095ea39 SHA-1: 7b44c4042f5491b9c706d145bb0f61b3866b8e0c SHA-256: ebfdde1a33151635507929d76c0eed7e17570851a048545b8a96f8e8af3b10e9
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It leverages SEO poisoning by including keywords like 'Foxconn motherboard audio drivers' in its metadata and body to attract users searching for specific software. The presence of numerous external URIs, many pointing to disposable hosting, suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=foxconn+motherboard+audio+drivers+for+windows+7+free+download
    • http://ledy66.net/livros_de_histria_do_brasil_downloadlpjxf.pdf
    • http://about-igsupport.com/books_like_midnight_sunjiy7o.pdf
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5fe0b6e3d5a68.pdf
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5ff933f6c4e12.pdf
    • http://finofubamu.mygamesonline.org/book_to_learn_english_speaking.pdf
    • http://tipopajokoti.iblogger.org/behringer_u-_phoria_umc202hd_driver_windows_10.pdf
    • http://nozudozaki.22web.org/gegedinixifajukobirupoj.pdf
    • http://uptodate.site/how_to_check_transmission_fluid_on_2004_dodge_dakotakarsx.pdf
    • http://about-fb-support.com/rsos_form_admit_cardb2tu1.pdf
    • https://cdn-cms.f-static.net/uploads/4462096/normal_6038c27f2fae7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/megodipewukitoj/group_discussion_report.pdf
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_3bbd9662058343a0add6fa594691a4b4.pdf?index=true
    • https://e29f0852-aa8c-4fc4-a5db-fcd144ab7086.filesusr.com/ugd/b730be_451c575fcd784049b3087f2a5ca73914.pdf?index=true
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_6381fff9c93e47d6a8ed83e386189d11.pdf?index=true
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_26a6f80401c54404bec34788934f1a6c.pdf?index=true
    • http://roporuti.onlinewebshop.net/ryobi_backpack_blower_760_cfm_manual.pdf
    • http://witimalolikoji.rf.gd/5106695300.pdf
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_9c6ace39477742efaeef494e4fd72551.pdf?index=true
    • https://s3.amazonaws.com/nuvukivaxiren/34661974741.pdf
    • http://zesojowikodojaw.rf.gd/26629149874.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46f.bin
c0c2746f1463c542ca2ca9167969d5675b8aef7b1e6a07b02364fa0ef17918ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 5656 bytes
font_01_sfnt_off000107a2.bin
9340ce83c941d651725e4d479a48932c9600e34b06c90e01529f597dacd67f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 11384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.