Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4c2523be30c169…

MALICIOUS

PDF

87.1 KB Created: 2021-07-07 03:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 05f1bf63ff664967ed30de07f8a09e05 SHA-1: f1fd5caa9940806455617a5abefa97861f1dc322 SHA-256: 5c4c2523be30c16978e2478102e5b1284a0294336a68eb8c05e89dfb206ccd12
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of a 'witcher 3' search term in one URL indicates a potential bait for users searching for game-related content. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://coretry.ru/uplcv?utm_term=witcher+3+find+the+solution+to+master+mirror%27s+riddle PDF link annotation
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/70de94633500e657c9acdc0ead5917c0/vupijivojulijiwekofonovi.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/87c6905716deb34e71c63038dc6026c1/42789659447.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/51957377978.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/98001423442.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/6462624228.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c257b3ec698---tevelerisujewepifixiso.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/96dcff40887417f2fa2416439ba688aa/88504761108.pdfIn PDF document text
    • https://andrejc.si/files/file/gebowirolazapiluzapi.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/d8b1f242f09659a7e04a864eb938dee9/11010101994.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d78e9a9c0e9---19901652485.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/93398133378.pdfIn PDF document text
    • https://businesslife.com/content/file/gikavumotilamusited.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/39218032695.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080cc4d92308---30297308813.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/263805448.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd12046ae6---mefakijotixakefevanaza.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a28a88930fc---76730586260.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c354c7c9ba---54030935207.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2272c305cc---38477738482.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dff17f7ba6eea63f9dce59463f6b3102/ziwusoweporavi.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/pekasuwusewilefodi.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/31732007555.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/62329127573.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/lufuvipafokarebulij.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_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 11040 bytes
SHA-256: 04e32cce4678b891647680dc01bffc5463ad8baf01a4b7a06b40e805c849961c
font_01_sfnt_off00010b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B61 16560 bytes
SHA-256: 55666cc2e3cbcc1bb90f720fe0823b4ad59a998fc4cfec84d7de1d4894a5ce0e
font_02_sfnt_off00013671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1