Malicious PDF — malware analysis report

Static analysis result for SHA-256 84cade5ef0672d3c…

MALICIOUS

PDF

70.0 KB Created: 2021-10-03 07:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6d0fa3ec1e4426237d23ec129fe8a53b SHA-1: 308a6e032b2c23d021099201e4dfe8deb7208c12 SHA-256: 84cade5ef0672d3c03782a28e558ed3ad36715ae5c325bef2163dfbdff22cbb8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting, characteristic of a link farm used to distribute malicious content or phish for credentials. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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://allytemp.ru/uplcv?utm_term=english+word+with+3+consecutive+double+letters PDF link annotation
    • http://rld-carbon.com/file/ligafar.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/satozevotoput.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/80821418334.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/15360487598.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/raguwafudojujakabopemotup.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/16871502455.pdfIn PDF document text
    • http://pnalog.ru/images/file/fuxibobibataz.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/35825013057.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/deguronivomezaxolofotejad.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373822129f3---22117505576.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/60603494540.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/mifufoguzowuvakubija.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/basunuzeka.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614806afa5d7d---nubesovadipumotepidevit.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/52870872622.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/mosujavanibapagolori.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210904042508698.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/12269223952.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/37133812576.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/bawefulosesiz.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/mijemazowiwex.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/27494671276.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/2192854305.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF59 16680 bytes
SHA-256: c84a5bd95d8d757e9c60dd6c446001b56d66a078f6cf74dc62b577f21969e46b
font_01_sfnt_off0000d8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 11036 bytes
SHA-256: 5616c10035e799c5a41ce295ddbd8f21ba7701f75106a30d3cd45d13e49e3178
font_02_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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