Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa74133edb6aea8…

MALICIOUS

PDF

137.6 KB Created: 2021-06-29 17:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bb323a0bba823e3b00a4a396bd2dedfc SHA-1: aed4114034aa0a6d39a3923f1d17e6085a9014b6 SHA-256: 3aa74133edb6aea871a17dd27c5e8b2842ab1cc31697678398413a307f0d1184
156 Risk Score

Malware Insights

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

The sample was identified as malicious by a ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress upload directories. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96995e50f---25689506695.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087efb00c2d0---70124764419.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec96a76562---4914774300.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/6r4f8230kvkbuohbjljql767k2/pajosubemunelusem.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aebdd10f16d---68641697707.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/q69r87rp1fvc2hmne0d3s53n18/25882543891.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/80117143307.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ct0meo9t607bjglon3ku6bsjd2/kefozufapa.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/38dc07bc03e1aa4604a304429f7f3f7e/nabijilemirujasutibasaluw.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/bafemimafufe.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/794d522f905c38537acf2ee727d7483d/pulilijikanofonage.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b0e798ff7---78775322821.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/nibujumamuxiz.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe29c63fe3---dojepitakatowobufifo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d859bd3050---26492069284.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083b14952fdd---34287527554.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e4094a476bf2bf01effb7d75121f788f/671180299.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/6782526136.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/16736893911.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/36091847763.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/disisozokaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=history+of+political+parties+in+nigeria+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_off0001ba9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA9C 17204 bytes
SHA-256: 1daa7b1b5021eec475200d5c91fe1bb748d27fc33f7cf0da44ba66c2a83aa797
font_01_sfnt_off0001e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7A8 10900 bytes
SHA-256: 187a4b0eb09322ad1d4f0bdb217912af44c5c1bf5fd91a4ca52b19529753c0c8
font_02_sfnt_off000200d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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