Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8b558d0c741b59…

MALICIOUS

PDF

84.2 KB Created: 2021-08-21 11:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 2874aa574bc7a0d642f065f6ffb8333e SHA-1: ead9a50753af6bc04c406fa9953ff5cfe136435c SHA-256: aa8b558d0c741b598582d12ecb724ab49a3ab09493dd28f67f53e832868af1d0
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://prime42.ru/userfiles/files/wewunevir.pdf In PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/suvabakotuzezasubejimi.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/9raqhg2n98oqov9k58u4tlk217/39367791944.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0ce5015548c460d67dd62a79d996ba22/13704371775.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a41a293e928102f6ddb86c31a73bdb61/18124869477.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/pakeregegovebufos.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ajafelixugebidej.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/wafitakizulefewag.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161173c0832b31---89542188872.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/5334700614.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/pufixukezinanadifod.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78cfcac31---betufupik.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cedcbc02237---jimakobefatixamimakore.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/34747214791.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/ca6ebce0e9f3a69f012bd318a9846232/keturafixadixemeperowo.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/fazopofafafunorumilav.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/mazojavoribezamidolinilo.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae5fc2c215---babolawobokedatopatimu.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8588d0e07e---wibusukugurotomizejigi.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b545deca0e7---25851261644.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/bavafewewikubesanepareto.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/faralegojigav.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ecf22fa9f---nibokolalijakowesitudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=capital+case+google+sheetsPDF 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_off0000e054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE054 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 18364 bytes
SHA-256: 02aeb4bff1acefcbd449464df1a24b6646d81ea045744314e81ed3586f0461d0
font_02_sfnt_off0001292d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292D 10480 bytes
SHA-256: 565af7e2018f1fe42bbe03a4d6b797ff39fd08bccee1709c33946508d4ffc677