Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcf1bdf281fa69c…

MALICIOUS

PDF

75.6 KB Created: 2021-02-22 15:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f9fb1acbc630cd46eff396ce46082103 SHA-1: 6adae4bd1906f30edd343ecbb540266cf42130e5 SHA-256: 8dcf1bdf281fa69c36181bdbef343e79296ba0a5f7e8f020dc5daf11e2ad8789
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain ('maypoin.ru') that is likely part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute content across many sites. ClamAV detection and ML classification 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://maypoin.ru/strik?utm_term=remington+model+700+sps+tactical+range PDF link annotation
    • https://fijudemi.weebly.com/uploads/1/3/4/4/134400988/fewuken-zaxabulumu-wasiwibupa-jojisijisopibig.pdfIn PDF document text
    • http://rm-swis-mine.com/41065354240iwj4n.pdfIn PDF document text
    • http://vilopeg.xyz/vexezaxiziweromo3htph.pdfIn PDF document text
    • http://chebsvet.ru/15487375702c5utv.pdfIn PDF document text
    • https://buwolipirawelas.weebly.com/uploads/1/3/0/8/130874522/fudufepa.pdfIn PDF document text
    • http://goossyy.online/ars_notoria_espaolu78oh.pdfIn PDF document text
    • https://guzagotoxi.weebly.com/uploads/1/3/5/3/135313280/2753842.pdfIn PDF document text
    • https://xozipirun.weebly.com/uploads/1/3/5/3/135324749/kusemesarukubuxupop.pdfIn PDF document text
    • http://topsol.xyz/bifatirogidifomezejm42dw.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
    • https://s3.amazonaws.com/lebaxa/53961590801.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/analisis_de_datos_estadisticos_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/zurosuvaweb.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/benson_idahosa_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/fepefive.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/97476182012.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/ankeny_police_department_annual_report.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_off0000dba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 5408 bytes
SHA-256: 44b01278b5693c570838d7f9b9142d277e8fadbc77621f27ea6a7dbb10fb9ab6
font_01_sfnt_off0000edf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF8 10992 bytes
SHA-256: b15322ead6c9966acfc57b283c8b0ab8216fa3b27d0e6c3d038d388a44a113db
font_02_sfnt_off0001138f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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