Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1fe51903030503…

MALICIOUS

PDF

100.7 KB Created: 2021-08-17 14:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: cdf5af6861738c2d3bf7adf24d101c6e SHA-1: fdadb39ede4ea6ceaa033cef4cc3444b1ad93085 SHA-256: 5a1fe5190303050382251ef3a0004588d81842e8dc85d9a43854024e574a0036
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://crysiq.ru/uplcv?utm_term=how+to+crack+salesforce+admin+interview PDF link annotation
    • https://autoroman-service.ro/imagini_ws/luferufobivejofuturo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46d0fac60a---lezogakuxumojojinopuwozul.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/298977aa40336f1623c76474f8485ca3/nedivave.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/36168002756.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/jadolefoferi.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/98b95906364f15547dfda5d9be676def/27349744479.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202105112233368899.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/xeburuliwadupufakor.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/62652376962.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/67249271665.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/giziwegonapavikegurixoga.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611355bd2737a---76689810469.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/7200850175.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/99236595327.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bc35cb67a---zokarerusotelavugi.pdfIn PDF document text
    • http://www.centralperdana.com/file/8702044283.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/rujelivonujamukum.pdfIn PDF document text
    • https://la-klamm.org/Files/files/52659145493.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/9b4bcedfe47cfc296f9e37126e7c7795/17072688079.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/ugo9297pl45954ttouku901gg0/ruzodeboz.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/4348832893.pdfIn PDF document text
    • http://vodnik48.ru/content/file/paxijugawo.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160706333c1310---27129522056.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b5de2a66a01---91643864546.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 10872 bytes
SHA-256: d974453f368cd606f9551780c140fee118182b5ff71937166c4c6f45fbd360a5
font_01_sfnt_off00012891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12891 16116 bytes
SHA-256: 74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
font_02_sfnt_off00013de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE5 17584 bytes
SHA-256: 3acc7419d1d4f38234ee9175e751b3f6d25bfb3eeafdc76e8f567791b6c98bb6
font_03_sfnt_off00016c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1