Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2b853a6f032236…

MALICIOUS

PDF

114.4 KB Created: 2021-07-23 18:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0d974bcc2e0ef3aa494841559ed686ae SHA-1: fd06b07d9cdff0fb5a391a3fd00c671aa3f10823 SHA-256: 2d2b853a6f0322360aca20f0ad3ebd9485074f6e3e2c0183354b716b76523c20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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 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://prestinireedcorp.com/userfiles/files/46001187460.pdf In PDF document text
    • http://maxidmum.com/images/upload/fck/file/80830088891.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ij2no53f5ks4mfbfqinnai7ec2/sumekugixifenewu.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/fafukowa.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/71146404044.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/putibejixiwofet.pdfIn PDF document text
    • http://szpk.hu/_user/file/37696523263.pdfIn PDF document text
    • https://theurbanthinktank.com/files/taxilexejuvejinuwubu.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fe4cbed7---ruxat.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vmc3qhf9i2qfbos4rlqmo56179/pifewagiwez.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/telokavusitobekodafil.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/zadebifojo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9517fc5b0c---famezelarerimitokikow.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/1a24577ea5064a41cf2fc2d076a66866/xomitufedadexu.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/xilitoxapeloli.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa7bcc6edd---33724925595.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/90595987597.pdfIn PDF document text
    • http://amesonsofallen.org/clients/53156/File/16818391779.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d57fd6c28fe0adb2836d329939b1754e/82419159856.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a23e27b6ed---6169849970.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f40a45e270---73923758166.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718928cd8f8---xudivalipefajomipatanegem.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4801e1169d---96618302905.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/vozesadifaxilujanatef.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/zibuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=analisis+de+la+pelicula+piratas+de+silicon+valleyPDF 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_off000157ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157EC 10768 bytes
SHA-256: 15cf0739bdb2a8c43c78a06594aac579af5ac7bbaed32521a7b5d7b944080d0d
font_01_sfnt_off000170dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000188ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188EF 18868 bytes
SHA-256: cd0bfe15ed28db33795ab2f8b58d5813cabc3d0715f48275f1ce1b197210e8bd