Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61e88bace8229da…

MALICIOUS

PDF

80.5 KB Created: 2021-07-26 05:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8988a103e5026330ac3f20f4c69b9dac SHA-1: b2f33baca4beed3fe68a2298bbd1590a237790fe SHA-256: f61e88bace8229daadd3e5120966eb1c0fd898d47f41a9589d27e1a85a817d32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ff9efd58088f88d30edf0eaa3ceb03cf/54498977606.pdf In PDF document text
    • http://liburnia.pl/userfiles/file/314199857.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a652c7c6e2c---17200055971.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/6cnar33hbnsuc37a7laphoarrb/57693211360.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aacae9cfd20---37572939001.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/29842432342.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160aabdfdaa405---82247579045.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/3373701844.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/d1758a2a5bc93fb0365aec71c720a51d/fibelobekewodavesusiwe.pdfIn PDF document text
    • http://remobudostol.pl/pliki/sisokinijetadiledefuzot.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0afe2744c1---libuxidololonetip.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb49625bf2---fogepatelutoxubipomugu.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/bopas.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/33219326862.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/98896884947.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/543314429.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/92855479154.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/xatufazasi.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/124da57d3e5abdc165a54e6c99700c64/tasuruzupire.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e969cba7208500a1b55e68893adbb6fc/guvasabadix.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/lss3rk1h5d2ne57o89c711ugf0/52576045048.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+find+mean+median+and+mode+for+ungrouped+dataPDF 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_off0000d59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 10804 bytes
SHA-256: 52c7a9291fd7ce562dbb62b41eb5186496a1a76116d6555b6361e204ffdf0335
font_01_sfnt_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 17188 bytes
SHA-256: 895a1d8d58d13a535ca2944f0c1ed33b0d5e0c046501915a1a4aa5ac1040d114
font_02_sfnt_off00011b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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