Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc0eb32dd73535e…

MALICIOUS

PDF

78.6 KB Created: 2021-03-24 05:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 85e93aba49bf57199de0fb6e91258dc0 SHA-1: b543297a2a239cf9f2d542bafafd61d1c0c3922f SHA-256: 5cc0eb32dd73535e4689168d1385128d8d3046f4925e6d08a8cbe946b72c2bac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/aws?utm_term=how+to+turn+on+gulfstream+pool+heater PDF link annotation
    • http://dozokite.22web.org/telazudefonizodavagup.pdfIn PDF document text
    • https://cdn.sqhk.co/metajewamiva/bhdqhaJ/nfl_playoff_picture_2021_bracket.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/brunfelsia_grandiflora.pdfIn PDF document text
    • http://rokamik.iblogger.org/old_yeller_book_chapter_11_summary.pdfIn PDF document text
    • http://fortysgjdk.fun/fozanesuvekezsszlo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_5fd285b0577bc.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/fNighcO/50369902562.pdfIn PDF document text
    • http://goodshopsales.xyz/31021321099ptb84.pdfIn PDF document text
    • http://kovokowem.iblogger.org/significado_de_la_palabra_copla_de_arte_mayor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368746/normal_5fcbf21ce474b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcad11cd9879.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/geronimo_stilton_books_list_with_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijiwef.epizy.com/darijupakiwujizirav.pdfIn PDF document text
    • http://bedegexemizi.epizy.com/92425341003.pdfIn PDF document text
    • http://dajovomofoziso.rf.gd/bajrang_dal_photo_hd.pdfIn PDF document text
    • http://tivapatovike.epizy.com/speaker_knockerz_rico_story_real_news_report.pdfIn PDF document text
    • http://rivebop.epizy.com/human_anatomy_and_physiology_10th_edition_free.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/nimugikaxe.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_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 5368 bytes
SHA-256: 2d1cfbb48ca2fe70ea75ddd7a1c390ac8a61530a1c15d9ea594f3882f4159322
font_01_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 10188 bytes
SHA-256: d7eea990d92355f801ec1cf1025974a7481169df5249b25b3eb12479af7fa8a5

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