Malicious PDF — malware analysis report

Static analysis result for SHA-256 6798fb648d25ca7a…

MALICIOUS

PDF

84.5 KB Created: 2021-09-14 01:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5301e623a32ad8f5cefb7c2f5b44a3f3 SHA-1: a5b7efdc1243f2e422c34b16d477e6de0b79bece SHA-256: 6798fb648d25ca7abccca0da43980e08cff6cfcf7878e837fa0600bd2eb70036
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. One prominent URL, 'https://pixomot.ru/uplcv?utm_term=puffin+browser+pro+free+download+for+android', is presented as a lure for downloading software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=puffin+browser+pro+free+download+for+android PDF link annotation
    • http://decaiyun.com/upload/file/2109091159583714432aw3kpgpg8ot.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/masikavojofivikoze.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/xabesosenetupoke.pdfIn PDF document text
    • http://mayphatdienngocquang.com/media/ftp/file/69918621899.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fce38cf7c5---gulemadunefasofipirise.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/34140405674.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/rivedujibamuruba.pdfIn PDF document text
    • http://ruihuitax.com/files/file/vodaxe.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/xujoriwitifimovarademuf.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/70378591536.pdfIn PDF document text
    • http://pasted-radio.de/web/files/29911352026.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/93056973129.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/4857538343.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/dokixigesededosix.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/1619750623.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/12/xoduxuwoxos.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/biwodufedaloves.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/44159863911.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/21511867771.pdfIn PDF document text
    • http://massiimo.com/piceditor/file/tidizom.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/futitinowe.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16136d6022e354---78469721977.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 22636 bytes
SHA-256: f4803ff831a1d7db2b9e281b2b90468790276767fc96067c21bd283424840c71
font_01_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B9 10720 bytes
SHA-256: c2f2548c60006095fc1d5ed062cec70d90182d0abf381831e6f0830d8de4c67c
font_03_sfnt_off00013b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B39 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8

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