Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ec152fe8170b4e…

MALICIOUS

PDF

94.4 KB Created: 2021-07-30 19:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dd12909934397d99a0cdc59c908343af SHA-1: a1356fe6b2bfd7c04c49a4163fdd0f927f023671 SHA-256: 54ec152fe8170b4e6a1ec3b8d08acfcbf6951a86c654263a745dc5d0a9f7e015
96 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to websites hosted on compromised CMS platforms. The ML classifier strongly indicates maliciousness, and the heuristic firings suggest this is a link farm designed to redirect users to potentially malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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://comp-art.ru/userfiles/file/sisiwunuwopufilep.pdf In PDF document text
    • http://capri.lt/userfiles/files/fasuzevabajek.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b370f14b961---pujaduwuzekoxulevatib.pdfIn PDF document text
    • http://princeton1959.com/clients/863834/File/zurokizewunafipi.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/jusopajavusitikabototipe.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a336773dc68---gimuvoropitu.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/vigijagelato.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b708727340---12823627112.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/tetadibizoda.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609e98e4d2940---tabatudig.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/81921126106.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/5908614739.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/cemclvtlsct5fa1jr51a8128i4/96195598482.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/41577988989.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160deb5d455c2e---71906097760.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/fafebowa.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/zafojunilerikorojiwexu.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/larupezewexalokovanag.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608535aae767a---79934901029.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e00269bc140---22612055109.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/ptf29nd2itpca3e89j1cei8ee3/goguliwufiwizumuburoj.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/dce109463fd032150b3fc7076d2bbe9e/vogokabotajafofafuza.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acf15752431---88884809047.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5fa12e4aa2765753f6a2af68a2b429ca/61943005470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+hack+money+on+virtual+families+2PDF 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_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 17852 bytes
SHA-256: 3c79012d8ed4c287d8990eec478a36626265bc0977c50a9e64e7d30d1b866eeb
font_01_sfnt_off00013889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000150a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A0 11172 bytes
SHA-256: b7cc92ef16d9ea467d40a8066ace089a9682c68ecd5b20ff5fbd01f068c6f537