Malicious PDF — malware analysis report

Static analysis result for SHA-256 648ac2fa63b592b7…

MALICIOUS

PDF

90.7 KB Created: 2021-06-26 00:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fd5b6d904383865832f66e67a4366022 SHA-1: d8bf2d3bfe49172838629f780f2e9580a2b5721d SHA-256: 648ac2fa63b592b74093a3939c24bd78bb5e28abbd077a95ff97c6699f64ed75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lure users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://archism.ru/uplcv?utm_term=lil+bibby+and+tink PDF link annotation
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/713358b57c0780eeab6adf04fb72c838/wegozawolasezaz.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/a64068de9ed786ded2db3f40a7d9d1ec/23552033868.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf7294186a---mebisepof.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/72839223523.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/jhlqnga0cnjph8ftll9f7onmnd/23660132314.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/74836187018.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/fb1ab049a53ab6009579fb62880ee204/44918062781.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/pilemolunufegerixaw.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/70574167772.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608350ef620af---bitowipe.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/7686b17074e449c5521f4298bc61251d/xesaweda.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/vovasoxuf.pdfIn PDF document text
    • https://adikkedua.com/contents//files/26469409455.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/kumirexabonulararuzevavut.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/5aslnoplnig9jjjbielssrrdgu/41549956134.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/tanuresajeruduwapakozeziz.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/080j6k9rl6qvg5ec9tj5f0i1so/18356733978.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/795ab82f0908cdacff3af8f3d8829768/vafit.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2i4v5m6j5evchqjm0ik3botd02/norodijeziwunuruselufov.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609becc0b9a7d---domoliwimazifipu.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/somabasu.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/50951554380.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f4f0d25f0---95781809496.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_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 17132 bytes
SHA-256: eb1426fcb15e26dddd3df118d93a77c6badd24a19ba76ffb59f609cec1cf9e16
font_01_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 10024 bytes
SHA-256: 509d523f7202b95c48353c233645ef5d7d9bf13d190faa84969161d5a69bd7c7
font_02_sfnt_off00012f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001477b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477B 16316 bytes
SHA-256: dd83067eb133e7faa5eaf37ab1fe78ce06fcf953ed0f23962bc054b64bea50ed

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