Malicious PDF — malware analysis report

Static analysis result for SHA-256 baaf9e2f3e1731c5…

MALICIOUS

PDF

84.0 KB Created: 2021-09-16 20:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2c4396dcd956d831bdca2088634f24f5 SHA-1: 1063dfcee3ca335bc654b2138b75b4845c296898 SHA-256: baaf9e2f3e1731c569a6df2ae65fb582efe0df28a3318db0075a952b5987f246
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farm heuristics suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=justice+league+2+full+movie+in+english PDF link annotation
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136c0d502788---22955210505.pdfIn PDF document text
    • http://silver1979.com/upload/file/taxinikemarokisonugap.pdfIn PDF document text
    • http://clerus.hu/files/file/pupanawoloka.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/xuzezokosupam.pdfIn PDF document text
    • http://t-cso.com/upload/file_folder/file/472420195.pdfIn PDF document text
    • http://designgaleria.hu/userfiles/file/88593297123.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/34905104144.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/nopixewabimu.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161404368dc483---77802425015.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd8b6b43fa---98293978809.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16130080eb8b4f---zelasipur.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/vumemuxebizunezemevab.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/57852082380.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/pijirazovitexidasid.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/16393643212.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/25818835628.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/fatimulabat.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tajitisa.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/xudajejamoxifinixijuna.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/28311867928.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/kubofawiket.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/69983693784.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/wipufitugujomovoje.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132629a356b1---55019254549.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/wexovabikipa.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/bepuretexonijizoxot.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/jobozoxetizojux.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_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 10960 bytes
SHA-256: 96abdbfeee66aa5dd0f88a3c9ca18474ec84c7650d38c953bd78445fc2d377b3
font_02_sfnt_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 17960 bytes
SHA-256: cd2b76fe3a9e2c507009a517321d7cad5320a9ebb0eb1f15987b7005a1e4e70b