Malicious PDF — malware analysis report

Static analysis result for SHA-256 416d915e35eef02b…

MALICIOUS

PDF

107.5 KB Created: 2021-03-23 03:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 66b551a68805bf5dda37baf68908f7c3 SHA-1: 0e80d008222360b00cfdb4bb9db4db33d7759485 SHA-256: 416d915e35eef02bb8c3bf2af59b358276c89d41a6a843a85884ee8ceea53446
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to suspicious domains, including a known malicious redirector at 'https://dafemum.ru/strik'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the ML/ClamAV findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=maximum+ride+2nd+movie In PDF document text
    • http://vedivux.mygamesonline.org/sixafonimakujomosebev.pdfIn PDF document text
    • http://yognat.space/fudel46bh4.pdfIn PDF document text
    • http://useporte.xyz/pavaviq4925.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/eureka_forbes_vacuum_cleaner_service_centre_in_coimbatore.pdfIn PDF document text
    • http://tramlaweq.online/santa_clara_unified_school_district_superintendent_salarynnvnj.pdfIn PDF document text
    • http://clipshd.design/toripamedusb85b.pdfIn PDF document text
    • http://nowatora.22web.org/mosofosaxitibozixeraval.pdfIn PDF document text
    • http://copyright-central-media.com/finite_element_analysis_package_ansys5ltdg.pdfIn PDF document text
    • http://waverufusufafuv.scienceontheweb.net/rome_metro_train_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxuzoto.onlinewebshop.net/setixuwabakinuxitudusut.pdfIn PDF document text
    • http://pupokimixuveted.epizy.com/kisufide.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_243a4261142648e398d723081cd86d43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xujitezu/60726404183.pdfIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_aa42d2ad52fc4f138bb23c5a250fbce9.pdf?index=trueIn PDF document text
    • http://nesemuvalumut.rf.gd/lowes_charitable_foundation_grants.pdfIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/35088873230.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/tikalajisolipe.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_f5c4e77eddc44376b56aa463e2f64fda.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_44e9d4db2df044b185f2f1faa230c0ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numunenoji/14370516879.pdfIn PDF document text
    • http://xitimevekotumev.rf.gd/how_to_reset_a_reznor_heater.pdfIn PDF document text
    • http://tosakiviga.rf.gd/vatezinowotipowadijame.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_eb3a29152837458bb94689d70fae4dee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/sagemcom_fast_5260_router_review.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_off0001686f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1686F 5024 bytes
SHA-256: a76ec6b93f5fe63af56e78238ea78a003102e0fb79a29073f9231d6086eb6c4d
font_01_sfnt_off00017984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17984 11236 bytes
SHA-256: 9c4b5a3e2a65537180cd25c4b16d501b508fe00b167a1af73cc33c60d395a0ae

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