Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd7659141c1ace2…

MALICIOUS

PDF

76.1 KB Created: 2021-09-03 15:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b8dd61e46c1fea75bca7a9e19328c2b SHA-1: 73c94bb6624f05bcc0577e81df2eba1b558e9aea SHA-256: fdd7659141c1ace2c4e40f385e891e50e9a7dfcf69bba5aeb719c82a5c036566
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised CMS uploads and disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and URL heuristics strongly suggest it's designed to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://profesniprukaz.cz/ckfinder/userfiles/files/tapizitor.pdf In PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ec44867eb---zonobalupeg.pdfIn PDF document text
    • http://benrassam.com/uploads/files/vagifimopuvi.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/jaraf.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb567731f---ranuxusimubofaf.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/piboz.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f452c53bce---botegukinelubisetosoxaka.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/zizenikariruxaza.pdfIn PDF document text
    • https://lavaecucebrescia.it/file/wurakexobafo.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/pofenutubijinujuduno.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/53881674222.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/lugeburarugudil.pdfIn PDF document text
    • http://servmed.net/userfiles/file/ximakimasufuji.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075bcaae7f6b---rizejigozomawomigiso.pdfIn PDF document text
    • https://sitarasign.ir/data/file/16871949753.pdfIn PDF document text
    • http://minhanh.com/files/27081665285.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/jewonuvibunakimiwemozar.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cab67daa3b0a127d0aa9a2069afc0611/2935327858.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/24513757485.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/93784473315.pdfIn PDF document text
    • https://baongochoa.com/upload/file/95964635993.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/zovadorimadomifunop.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a320bc55279---63736289423.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/xutosarilapinufefoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=balluff+photoelectric+sensor+pdfPDF 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_off0000c695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC695 10872 bytes
SHA-256: 6ba8fa2c68cba9bafe83ecda6a20eba1f5e0b03ecf731129e57bb7bfae5cda09
font_01_sfnt_off0000dfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA4 16588 bytes
SHA-256: 4df76fe0f011ddc8da244cdd75d0afd38b498b121161cef0445f6387e5281be8
font_02_sfnt_off00010a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.