Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b5bb92593d440f…

MALICIOUS

PDF

78.6 KB Created: 2021-05-15 04:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 87c7ffceb7e62003b4fa58fa53c57cb0 SHA-1: 939364bb4679f1249222e083da01d67134a99881 SHA-256: a7b5bb92593d440fd7cb9c19b7463595c3d8c813fd70e56624fb206968cd6e37
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=how+to+use+tenergy+smart+charger PDF link annotation
    • https://cdn.sqhk.co/purorelaz/fB57hiL/map_with_voice_navigation.pdfIn PDF document text
    • http://bupomorefa.22web.org/6287293430.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/QgfAzq9/gsmarena_compare_camera.pdfIn PDF document text
    • https://josadezabo.weebly.com/uploads/1/3/4/4/134490641/b772fc317fd.pdfIn PDF document text
    • https://lulefimoka.weebly.com/uploads/1/3/2/7/132740328/desutaro.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/Sdjgpjj/mini_arcade_two_player_games_android.pdfIn PDF document text
    • https://cdn.sqhk.co/nunexijezep/QggvkFr/grow_merge_monsters_apk.pdfIn PDF document text
    • http://taxokisekajetek.22web.org/cremonini_group_annual_report.pdfIn PDF document text
    • http://xutarima.22web.org/book_review_format_example.pdfIn PDF document text
    • http://lijamerogavex.iblogger.org/bmt_tax_depreciation_schedule_application_form.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/sojopi.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/kvnhdsu/answering_interrogatories_under_oath.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levologujarobe.rf.gd/karezeruvimifoxilerera.pdfIn PDF document text
    • http://xugiben.epizy.com/certificate_template_free.pdfIn PDF document text
    • http://kalilom.epizy.com/problem_solving_skills_examples_for_performance_review.pdfIn PDF document text
    • http://xavobuwog.epizy.com/vafunudo.pdfIn PDF document text
    • http://dagajevefud.epizy.com/85000975755.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/75749152285.pdfIn PDF document text
    • http://tofewekuruf.epizy.com/boxufijawemonigusigaz.pdfIn PDF document text
    • http://zogemidagubaro.epizy.com/pukosamidolusepesogonik.pdfIn PDF document text
    • http://fatofugo.rf.gd/67590614932.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E6 3808 bytes
SHA-256: 808155e5d12c1cf9af5af8ae6feedfb048d7725c0993b3c3c03f8ac6cb5ca012
font_01_sfnt_off0000ef4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4B 5336 bytes
SHA-256: cc399cc2fdaed588833d76010b1c9c69561e9f35b4eafddd15b67acb50adc462
font_02_sfnt_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 12492 bytes
SHA-256: a30a3c2853d608f91f0db5ad3245fdd0544e92120319221281ed9e420ef107d7

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