Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dd04422724be67…

MALICIOUS

PDF

76.2 KB Created: 2021-03-26 09:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f6596eebb32242dba9388c8d3cb5161 SHA-1: 19a243755a87b061051ce0791ff69fdc9afbb73d SHA-256: 48dd04422724be67149f051f6e96e463d276cf3e2ab7ad8b14f830e474adcaca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=wells+fargo+wire+transfer+form+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448103/normal_6005de564a94b.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/is_epic_the_best_emr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370267/normal_5fe285709d02c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_602ebbea9ca65.pdfIn PDF document text
    • http://ruzodoveme.iblogger.org/fomagekefola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415962/normal_6009c0e443f0d.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/wheel_of_time_book_13_download.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/35484748118.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/penewokagagaxizevigedaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5ff2c6648551f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_60118ac34737a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_600f5978e4d30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_605d695b5a378.pdfIn PDF document text
    • http://vogeposekuxav.66ghz.com/guitar_chords_lessons_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/26431596751.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/votozumipodaxujigusefud.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/vedic_astrology_predictions_december_2020.pdfIn PDF document text
    • http://sisufovofow.atwebpages.com/cae_exam_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/lurexuf.pdfIn PDF document text
    • http://zewajus.rf.gd/mumulexo.pdfIn PDF document text
    • http://tadezaxe.rf.gd/david_deida_way_of_the_superior_man.pdfIn PDF document text
    • http://xirozaza.onlinewebshop.net/cecil_medicine_textbook.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_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 5468 bytes
SHA-256: 2b7d63ab5b82fa1a6e3a955120ef625d12ed3899d759608bb8e4326a7a4b6025
font_01_sfnt_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 11684 bytes
SHA-256: f51ebebf33e609b22d01241bc6fbc67f910b9a21329f254be4ad04123b6c78c9

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