Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ead64decf50eab9…

MALICIOUS

PDF

78.5 KB Created: 2021-09-18 18:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 523151f0ffcc1c768c43f083f925652c SHA-1: df69386d8a77a6a7aba350b783056b706f0a4522 SHA-256: 6ead64decf50eab9f657a3fe1e57f83e0f9c16e7d2ebd67dd91783ebc857846c
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://preciseenergygroup.com/media/36667440426.pdf In PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/76896246615.pdfIn PDF document text
    • http://minipit.com/data/files/81953214918.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/sufuderogafawuxumomaw.pdfIn PDF document text
    • https://zooiguana.pl/app/webroot/media/files/vafijuxepuzup.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/8276873854.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/vamanalemovugopizib.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/74326413665.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/guwajogeli.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/81017896543.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/49960325672.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/4871370061.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/wetesosu.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/fupogojatuzisosemawis.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/46556710310.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/katiteneziriwuludelexu.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/jodikinagevalabunokifeda.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/60837028302.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/12881208759.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/vimudimepulobika.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-6/20210906140548633652.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///41073780984.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/23804917925.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/fopubura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+collect+pokecoins+in+pokemon+goPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 10624 bytes
SHA-256: e732f83994a78b880fb3ca69e44d99b6c2b519108a00337f3736ecf13b3cadc1
font_02_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 17768 bytes
SHA-256: d2e52e653342c6119652c5ac344dbc847329ac94126658143c8dfa78777b3ef0

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