Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b245efc13cfe11…

MALICIOUS

PDF

98.6 KB Created: 2021-04-03 04:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 00bdc06c682f78b0a69e7a3cf433a13b SHA-1: 0a60c61d72f693e1a2b83b99f1d6b5a8645d1786 SHA-256: 86b245efc13cfe1167345f47f1e17d449f3d514f76a9e90d66cab5bc73e6ad59
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'http://pinopog.rf.gd/99001924177.pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external links and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=antibiotics+list+pdf PDF link annotation
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/17bdedab66345.pdfIn PDF document text
    • https://gobewuguwug.weebly.com/uploads/1/3/6/0/136056794/jeduxasap.pdfIn PDF document text
    • http://zijaditenup.getenjoyment.net/explosive_substance_act_1908.pdfIn PDF document text
    • https://wipowoniwosixad.weebly.com/uploads/1/3/0/7/130740259/wunikubi.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/x1_dvr_box_dimensions.pdfIn PDF document text
    • http://sifaritube.sportsontheweb.net/sulapevubepofuzakit.pdfIn PDF document text
    • https://nunodovov.weebly.com/uploads/1/3/1/3/131380210/4072258.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/porefoburaxufegivajodajax.pdfIn PDF document text
    • https://pefoduzipim.weebly.com/uploads/1/3/4/3/134371740/5cabd5c83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pinopog.rf.gd/99001924177.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_2c72bb52f3844df1a9a059d72f51d933.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/excel_vba_activesheet._querytables._add_csv.pdfIn PDF document text
    • http://tubulufegufixo.rf.gd/litikudabub.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/xitidewevepelefiz.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_a0b8a57cfaad4ffebfba248937151ce9.pdf?index=trueIn PDF document text
    • http://worizekadi.epizy.com/dnd_5e_warlock_patrons_homebrew.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/65082232783.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/87832149060.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/pomebodopogoneganuzasugev.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_18992cb2007840c999e81e145c5315fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogedozara/worlds_together_worlds_apart_volume_2_concise_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/kegifapogokomexibivowuje.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/scrypt_miner_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D4 4644 bytes
SHA-256: bcb6dacbe51ba330492fd8f52de60424537ee55e87eac8ffcac90d785163304f
font_01_sfnt_off00014698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14698 12144 bytes
SHA-256: 0479bb774a93d602edabd9b4b78462881b059371368803a1323888bea663555a
font_02_sfnt_off00016f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F19 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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