Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cad1445ca5d89ea…

MALICIOUS

PDF

73.7 KB Created: 2021-09-24 06:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bbc179459173cc6b33d298bc0d31e958 SHA-1: b79c97a0bc2fbe8c3a26239e28855ba8642986f6 SHA-256: 9cad1445ca5d89ea701073051b6daac26507f34707bece60254103a884a9dbbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs further supports a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=ios+pokemon+go+fake+gps PDF link annotation
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/pilagetoju.pdfIn PDF document text
    • http://zatacorp.com/upload/files/palofun.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/buneda.pdfIn PDF document text
    • http://infiniti.e-library.tw/uploads/files/39714749151.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/48492405088.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/88206799292.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/fekodegafe.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/l88d1bam079fi47r8kv5fp17o6/wexejemisetetavekutukaw.pdfIn PDF document text
    • http://bluebossa.pl/files/file/guwixobasi.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9acf71d85---43061860679.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/kodupizapina.pdfIn PDF document text
    • http://alvitraders.com/files/kepisabamor.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614751b41ab92---lanujanitudip.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/76068667990.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021092109562473499.pdfIn PDF document text
    • http://holland-ex.com/images/blog/file/95696139071.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614246e2b413c---45966672213.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210922005709.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/dexalamidabixejorez.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/20741404298.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/35035369621.pdfIn PDF document text
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/sozebasokawoliroxo.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/xejukeroxivamajamis.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_off0000bd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD96 17032 bytes
SHA-256: 7638cb04d77a4a8e235b545077e2c71423cf8003f942f52e1da721231be6556b
font_01_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 10408 bytes
SHA-256: a9ae937320ecdd1cc9dda284c37ad3095700aa780b659a9514338b069cc63763