Malicious PDF — malware analysis report

Static analysis result for SHA-256 d313a3b3ef59d94e…

MALICIOUS

PDF

77.6 KB Created: 2021-03-06 14:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 783a010826590df9d550d30f87ab06a1 SHA-1: 731dfcedcc017d10875db73dad9f81ca56724f1c SHA-256: d313a3b3ef59d94edd458a482e66a1bc7e0db8195f760d93462640f782691fef
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/123?utm_term=kitchenaid+superba+microwave+oven+combo+problems PDF link annotation
    • http://rozujed.sportsontheweb.net/beats_studio_3_review_cnet.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/how_to_mix_music_together_on_itunes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366032/normal_5fdd6da5ba610.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/star_trek_movies_chris_pine_castlb0a3.pdfIn PDF document text
    • http://sokfresh.fun/canada_visa_lottery_application_formsm5azf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5fe91e971abdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_5fd6a907ea839.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/how_much_do_hunter_douglas_silhouette_shades_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_60107edf62840.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/proof_of_service_small_claims.pdfIn PDF document text
    • http://leledup.mypressonline.com/409933989.pdfIn PDF document text
    • http://copyrighytsupport.com/yield_curve_recessioneh4r8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_27b0de532ea743e1bb5955647b75bcb3.pdf?index=trueIn PDF document text
    • http://piwolimosopobu.myartsonline.com/devefubup.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_16051406f14e493d8d5c835377c397db.pdf?index=trueIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/el_evangelio_de_tomas_libro_completo.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/3652492629.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_17146bb52ee842c89fd929ab29a986ac.pdf?index=trueIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_7dcba25ee78a400fb3b2b1a0fa0ed2a4.pdf?index=trueIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_4476cb5946254069ad8d58c6105fe8a0.pdf?index=trueIn 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_off0000f05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 5576 bytes
SHA-256: 0510d7a389fdf5abd9eec0a2087c2595c487a239b1eb5d0fb9a69ccc67d2dde5
font_01_sfnt_off0001033b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033B 11012 bytes
SHA-256: 83e447df5f279d34ffd746e128d55ddba368841afb4e46b681877ec279785261

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