Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14f246b40e0e728…

MALICIOUS

PDF

74.0 KB Created: 2021-05-09 00:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c63e9c7a48aac9004d2578b1bb761fb8 SHA-1: f4f3fa7491258f0365151a4466237f7791e811a4 SHA-256: d14f246b40e0e728f15562cfbc38725af6851a75082aa4a7167907869b3f322e
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'verizon network extender', suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=connect+to+verizon+network+extender In PDF document text
    • http://pexukakadom.22web.org/mabofepovidajivufobor.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/ehhggmy/wepifariretuzewugenamena.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/fvyiege/angie_s_list_st_cloud_mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fd0ff4e37451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448341/normal_5fef96d054451.pdfIn PDF document text
    • http://mexefolavizidi.iblogger.org/contoh_soal_psikotes_matematika_dasar_dan_jawabannya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5ae8ad-9635-43c6-a630-8ca671817e3a/best_deck_of_tarot_cards_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952e2d1e-4248-4f58-82ea-4faba629925e/odyssey_summary_book_10.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/19403351848.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_31c8bc3b266245659562df9654440742.pdf?index=trueIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_7c4490cde4a044f7922dbe5ffbd8c375.pdf?index=trueIn PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_6df3bf479ee34f4b9f59f85fbae83645.pdf?index=trueIn PDF document text
    • http://zixadadafupeg.epizy.com/apple_logo_png.pdfIn PDF document text
    • http://laxuzakefojo.epizy.com/beautiful_pics_for_whatsapp_dp.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/42944263114.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_f964ea38c5d543dd90c977daacca97e3.pdf?index=trueIn PDF document text
    • http://fatodonuvebenim.rf.gd/anomalous_secondary_growth_in_boerhaavia_stem.pdfIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_c74f3ecfbc4941a7a19b360374565d21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/7359571824.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_off0000e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 4752 bytes
SHA-256: 7f2cb11f5857f4548657c18058958a77881f3a8dc1dc18675574e5c87b631212
font_01_sfnt_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 10584 bytes
SHA-256: a4f5d899371544019e7752b20022603e5c72e7314ec325c8c69838b9d26acc6a

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