Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fbffc373bd4d5d…

MALICIOUS

PDF

75.3 KB Created: 2021-02-02 18:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b3cdf67762ce137416b687dbccea475 SHA-1: 69962eee7721d38bbd8ca6838b4b35c4a9164d3e SHA-256: 17fbffc373bd4d5d33bae85e85c03c44bd0d0520f4eeea90b8ba98cbd3813114
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable or suspicious domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content, despite being obfuscated, are indicative of a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/aws?utm_term=conan+d20+character+sheet PDF link annotation
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/6901557.pdfIn PDF document text
    • http://icub.tech/46732734558fno3j.pdfIn PDF document text
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/bemapobuludabutolon.pdfIn PDF document text
    • http://helpforteam.com/tarot_card_bookj9bf9.pdfIn PDF document text
    • http://my-favshopd.online/gunslinger_matt_mercer02yuy.pdfIn PDF document text
    • http://affilateapp.online/five_nights_in_anime_25pkhs.pdfIn PDF document text
    • http://hookup671.site/48315328827r28n2.pdfIn PDF document text
    • http://movajapenakinu.22web.org/django_template_context.pdfIn PDF document text
    • http://gijaziveved.iblogger.org/wogegawumo.pdfIn PDF document text
    • http://deflecfcvy.best/87843519240qzbon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tumaselopewebu.rf.gd/75923940808.pdfIn PDF document text
    • http://jirataser.rf.gd/hyperloop_technology_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/annual_report_pt_angkasa_pura_2.pdfIn PDF document text
    • http://ditajizuru.rf.gd/20906241177.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/92743347598.pdfIn PDF document text
    • http://zoratazux.epizy.com/70406130550.pdfIn PDF document text
    • http://zopatirek.epizy.com/lidugimedeka.pdfIn PDF document text
    • http://bonizeza.epizy.com/vuxipu.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_off0000ea6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6F 5172 bytes
SHA-256: d6599a56cc2972fad90ee8e9716a7715873dcfadcd1c953385cc68c5a8ae2a0d
font_01_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 10508 bytes
SHA-256: 64083c4390d592460483944acd846dc79aac5a18185558cc45b8928a289baa65

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