Malicious PDF — malware analysis report

Static analysis result for SHA-256 65050371daf7a180…

MALICIOUS

PDF

81.1 KB Created: 2021-09-04 17:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7b399862a4b88c26425b68c9d7526a8b SHA-1: d334aa894fc3acf09ccfcf6e5ad1b92d3a5d6045 SHA-256: 65050371daf7a1807a3107d8a3b1d22b0c3969aa6772f10754b1d01aea513af1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The file's structure and the presence of external links are consistent with a spearphishing attachment used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=neoplasia+intraepitelial+cervical+pdf+2017 PDF link annotation
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610113cb01b9b---64398255711.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cae6bd880---luduxiko.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210623_180C7CB642E898F7.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/684f4da8cae5dd96f6acff4594f35659/xuwaxasaduvivulerufenovoz.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c2f75ca1095010e37eb666c684dd329b/95435934219.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607289a70311a---xaburulubizamer.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962eab1ba1b---98246189114.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/sixurixamipawujepezefo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb287c997c---53795014685.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/pomirenapazumabimenaw.pdfIn PDF document text
    • http://asfalon.com/__files/file/vofevopavofugazivisumad.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/0uk786djck5giqi69ose4noji1/mujugelanozif.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/9b74818cc0fce736d638fa976caf89dd/59292187295.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/babizokisuwev.pdfIn PDF document text
    • http://wsm.hk/images/files/lumozobiborofijuludalitu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1610f422648c05---dilime.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a0b74537c---46548225779.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a2073594fbd---3280606783.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/67577794955.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/vokokowe.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/jogatoz.pdfIn PDF document text
    • http://merwepizza.com/upload/file/73336896149.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/6028107681.pdfIn PDF document text
    • http://irodori.kir.jp/files/file/wuzenus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD418 18432 bytes
SHA-256: 8a517e8718c03c61104170e8a1e395e1d13915a38bb23ea627a9fd60483ff95f
font_01_sfnt_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 11000 bytes
SHA-256: ca946ec56df02a37f4f0cce358b7335cf8480f75ff6a9dff119f2d665c4de7c6
font_02_sfnt_off00011e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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