Malicious PDF — malware analysis report

Static analysis result for SHA-256 2465a61209b8b7f4…

MALICIOUS

PDF

68.0 KB Created: 2021-01-28 01:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3b5872d62cc67dda6666194af44a2380 SHA-1: 25f865e60697a31c27cc2c8a9b01a5e550c6286d SHA-256: 2465a61209b8b7f4e89c1b84d0341d662303fa283371082fdc37f7372f4989b3
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an invisible link disguised as content related to a school volleyball camp, which redirects to a suspicious domain. This is a common phishing tactic to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/123?utm_term=auburn+riverside+high+school+volleyball+camp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467277/normal_5fdb64807a820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446377/normal_5ffc7e1abaad6.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/elder_scrolls_nirn_mapl9eef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5ff29caa45cb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_5fce7d03341ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_600a0bbfcfd6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417824/normal_5fe184747d244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417645/normal_600395e4f0dc5.pdfIn PDF document text
    • http://50offshop.info/53526191435s6dtz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459321/normal_6002723d79677.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/punurum/fighter_plane_simulator_game.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/apheresis_society_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/2019_tamil_movies_video_songs_kuttyweb.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/bulozazajivixomofol.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/clinical_trials_glossary.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/anglo_eastern_deck_cadet_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/raxasijuz.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/60564775508.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/zoboximinasezeni.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/zivuwomemuwopimexolezaz.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/kotilubiforilenew.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_off0000c9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 5776 bytes
SHA-256: 4b1ed3c93b63f571c466d4dce2a542a977325c8197a5e4e39be104d8386045e8
font_01_sfnt_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 10396 bytes
SHA-256: cef52bf07009fa7adba103d3cd63f468fbb50d909703c167983dc874f70371e1

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