Malicious PDF — malware analysis report

Static analysis result for SHA-256 219127d9c4715bd6…

MALICIOUS

PDF

89.5 KB Created: 2021-09-02 05:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1d4c4d40d757eb3d344fbfcc4383f7dd SHA-1: 8bdccf151c8cb4fd7cdb4e94ebc0c1a4e5b00124 SHA-256: 219127d9c4715bd63a307a9db341f9d9035f647946eb83b8f7d0b429c555a200
156 Risk Score

Malware Insights

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

The 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 and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://aordonez.com/images/contenidos/files/gogebewafaxisuram.pdf In PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/josutogadugedotuv.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/343fa20eacdb57328ca282b723a38367/vasiwokubawupadapibonajo.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/50381505632.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/gubogixo.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ubkt8igfvhevss57vaclf0nsp4/38970167165.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef8159647e---dupuxej.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/gq37v9sd7o16sk2rpmcimvh0p1/rarogofirosoderidolilalo.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/756fbbd2b7560a5183cc90521908449c/60769291052.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a094bad1f1c---rikamesifegebenoniwifo.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/janurepegutexa.pdfIn PDF document text
    • https://peterdegendt.be/file/duxedorokudidogominulala.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/40675648273.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/gagel.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/6427832015.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085856c1c70b---96302289055.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/57118937413.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160fd12ca29342---96545356297.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/23189b398bb54592a67abd96dcb67e7a/sapigadu.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/bebonibanejogutubejanaw.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/20822117807.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=balance+sheet+reconciliation+meaningPDF link annotation
    • 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_off0000f72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 18100 bytes
SHA-256: adae0eb33c1ef0ec1403f587cc8903ff1ed6a2a8f142b666bb528e468e696c27
font_01_sfnt_off00012691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12691 10732 bytes
SHA-256: df0d8b2e9b8fc8342f519382cb4403b8548cb30ecb4d4b3fde3b5dcace212ae6
font_02_sfnt_off00013f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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