Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9ce30fe1bcb234…

MALICIOUS

PDF

67.7 KB Created: 2021-04-28 04:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f82ad1a4a4d1ba3622193eb46fe5e39a SHA-1: 2dce863ef0cd3efb142a60aa27470caf14a3a6f3 SHA-256: 0c9ce30fe1bcb2343518af3f2d5d0409aab4c1a0a20234ffa71c0165814b78ef
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://botokaw.ru/strik?utm_term=mcculloch+line+trimmer+parts+australia', which is likely used to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 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://botokaw.ru/strik?utm_term=mcculloch+line+trimmer+parts+australia PDF link annotation
    • https://jonaditogun.weebly.com/uploads/1/3/1/4/131408899/petedek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452621/normal_600995295d79d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_600f60e45b74e.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/public_administration_review_journal.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/singer_sewing_machine_customer_care_number.pdfIn PDF document text
    • https://xekobemakisusij.weebly.com/uploads/1/3/1/4/131438823/lanisogalapa.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/58505897020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/77652842986.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/35372556355.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_cb8866c5790e4f1693cf22586f75fd3a.pdf?index=trueIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_5dd3d9e431e24164b22c7697557b6b47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/que_es_la_salsa_musica.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/ancient_greece_olympic_games_events.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_627be647a1d14b35baaa34baf15db3c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/dire_maul_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/60313675978.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/zovibibufujeguvafagusig.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/71565473249.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/writing_a_letter_to_a_friend_format.pdfIn PDF document text
    • https://182222a4-a7a4-434f-839c-7103b506edb5.filesusr.com/ugd/224a67_000a689e080a469e9fc47ee5c30ddcec.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_off0000cd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD10 5180 bytes
SHA-256: eaf25e852626eba0554f172fdbdb4c86cf3851db2efa79c3d69ed07243d20cc9
font_01_sfnt_off0000de84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 10248 bytes
SHA-256: a39cfb0c00014155b52de3485e59f3eb8be94b1a7d2fc7342b618d7d14cecd04

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