Malicious PDF — malware analysis report

Static analysis result for SHA-256 517dbeed5915d2c6…

MALICIOUS

PDF

75.4 KB Created: 2021-02-02 18:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 15a18a0eeda761e3a48616950710024b SHA-1: c858c76e5c424013e0aa37bb3624891a3c594d76 SHA-256: 517dbeed5915d2c66dceec3b47590ee1ea8a261730b4c3adacb18cbcf21e3859
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous external URIs, with a high concentration of links on disposable hosting, suggesting a link farm or phishing lure. The embedded URLs likely lead to further malicious content or phishing pages.

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://druttle.ru/wb?keyword=scope%20of%20variables%20in%20java%20pdf PDF link annotation
    • https://cdn.sqhk.co/lupokuna/hcMhjhc/70763135185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_60011be6c125c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5ff23fc047ce2.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/dRhajd1/infinity_loop_premium_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/jcyfjbJ/kitaleba.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/iggQchh/givatotadodunegifamebot.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ehagfMZ/84672471561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466673/normal_5fda238996680.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/jgidaDm/how_to_play_pyramid_solitaire_classic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447630/normal_5fe9aae86efaa.pdfIn PDF document text
    • http://fiwamixos.iblogger.org/excel_invoice_template_for_consulting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_5fe9b9d4850b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_6016b80f25eff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://juwelaloz.epizy.com/kempton_park_weather_report.pdfIn PDF document text
    • http://desakoda.rf.gd/teddy_bear_vpn.pdfIn PDF document text
    • http://talaxevavilur.rf.gd/lettering_templates_for_applique.pdfIn PDF document text
    • http://nisebot.epizy.com/canada_post_mail_forwarding_order_form.pdfIn PDF document text
    • http://nirobow.epizy.com/tokevubupibavo.pdfIn PDF document text
    • http://zoxutuperovizo.epizy.com/brompton_academy_uniform.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC676 5236 bytes
SHA-256: 8debbc282556d2e7a51eff3ac0d82e8955691008659d51a84f80aff63fc950cc
font_01_sfnt_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 10468 bytes
SHA-256: ec8eacb828406c45288b8f2ef09157ebd9651ae645334342ca54eedc5adf885a
font_02_sfnt_off0000fc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 16288 bytes
SHA-256: b9285184cc8b4970c7d3d1443aa1cccacea8a772f6d242be851d983006b65354
font_03_sfnt_off000111ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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