Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfd68f2217e8ecb…

MALICIOUS

PDF

70.8 KB Created: 2021-02-23 12:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 635efc4062b14dd52ce75c6c4b90e119 SHA-1: efe5b0f4391fee6f18122eb64c2b500a95dded56 SHA-256: 5dfd68f2217e8ecbc36f9a85c22897160c2c67869ce92336d1dcf80bbdbf4c2a
166 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits multiple suspicious heuristics, including invisible links to malicious domains and a link farm on disposable hosting. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as http://securitycheckingbrowservkcom.xyz/can_i_use_directv_on_apple_tvvmrw3.pdf, suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=how+to+write+a+review+about+a+story PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456984/normal_5fe26a7c0f135.pdfIn PDF document text
    • http://nikaold.site/alexander_amador_caldera_salasc7u79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5ff7d13a8e5ff.pdfIn PDF document text
    • http://worldhold.online/matezok0c5rp.pdfIn PDF document text
    • http://kizijele.iblogger.org/82712005801.pdfIn PDF document text
    • http://dirtygirl.fun/bliss_os_x86p2x0o.pdfIn PDF document text
    • http://sosunimepewe.22web.org/android_auto_mirror_senza_root.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/can_i_use_directv_on_apple_tvvmrw3.pdfIn PDF document text
    • http://neuroncraft.online/volume_of_a_cone_worksheetjufnm.pdfIn PDF document text
    • http://promooffer.site/click_clack_moo_ready_to_ready704m.pdfIn PDF document text
    • http://zerkalo-fugicar.website/best_ereader_for_annotatings8ngme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_5fcefff3c24af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://navadolaje.rf.gd/make_handwriting_worksheets_free_online.pdfIn PDF document text
    • http://vupafigimewex.rf.gd/pc_building_simulator_benchmark_guide.pdfIn PDF document text
    • http://karifopiti.epizy.com/giteroxiluvonapikeniguf.pdfIn PDF document text
    • http://mitudosukekunif.epizy.com/jurovimo.pdfIn PDF document text
    • http://waruzav.epizy.com/40996228725.pdfIn PDF document text
    • http://lagadasisipas.rf.gd/japezikuzowimotubujopov.pdfIn PDF document text
    • http://vovajixavago.epizy.com/blackmans_bay_primary_school_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 5000 bytes
SHA-256: 3441f27e69afe9a133cdbde3067f28062cc6f8a09cd9b69389bdaeed92d629e1
font_01_sfnt_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 10264 bytes
SHA-256: 723f44f260d36d5c2cc8f81f09502eede0ec364da11d26c07ec9e8acc9da1329

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