Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ece82699c58b143…

MALICIOUS

PDF

95.2 KB Created: 2021-03-24 23:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b4097329e3071dd39784fd7851c1316a SHA-1: 3cee505e80e10f2da572984a326f5691b7bcd64c SHA-256: 7ece82699c58b143e80670666e98a1eaba939b13404d1060248ffec28ad024f4
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://seumenha.ru/wix?keyword=sandy+elka+huron+valley+schools', which is likely used to direct users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=sandy+elka+huron+valley+schools PDF link annotation
    • https://fozaxuvuten.weebly.com/uploads/1/3/3/9/133986835/9517440.pdfIn PDF document text
    • https://mibujisoj.weebly.com/uploads/1/3/4/5/134525757/suxijiduwepigina.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/figuxiti.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/how_to_start_a_6hp_johnson_outboard_motorugmam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451027/normal_5fcac0783dd0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_601abda48106f.pdfIn PDF document text
    • http://d2-club.ru/nigijepikomedilibupob1m4is.pdfIn PDF document text
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/ziwotosigujumiv-musitimedaz-pepunumul.pdfIn PDF document text
    • http://livecopyrightverification.com/military_athlete_sandbag_half_moon_bayd41f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426699/normal_5fc95f33688b5.pdfIn PDF document text
    • http://fruitslope.online/what_is_the_purpose_of_corporate_social_responsibility_ukmoj6u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3b332a-6fc4-45cd-a48d-19dee710fd2a/juboku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf64777-d07a-4d82-a34f-0408ef8a0b34/florence_scovel_shinn_audio_books.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/84362485544.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/94051928178.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/zetuvomoronijimagiwiko.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/what_is_a_scouts_job.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/818988370.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/kegikakezababigusi.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/greenwich_university_fee_assessment_form.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/25481684420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb36920c-452c-49d6-bc46-c6bcae858df5/maze_runner_3_movie_download_in_hindi_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/bold_type_fonts_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2535a4d5-2e57-4271-800f-ad6ff40c3687/dekevovezujokedejuzi.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_off000139b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B9 5356 bytes
SHA-256: 1cd02f86d80555c449eb470e5e43311b6f86de30bb175a25dd49b689553465f1
font_01_sfnt_off00014bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF5 10240 bytes
SHA-256: c0eee5838c76004a0eb78c2b5aa6f2e3fcd2c969be80e68e607b5b6ca20d2792

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