Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7cd8b0f55beebf…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 05:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cb4354c89e2836778fecdc8ecd8836f3 SHA-1: 84ec7d34928377b71f605979857cac6d3e4f49b6 SHA-256: 1a7cd8b0f55beebf81c13ed91e49b582b5455e1424b1d1135907820f3e563f72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress upload directories or disposable hosting. This suggests the document's primary purpose is to act as a link farm, directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://aspirans.com/files/file/75576722044.pdf In PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210613_AD129B9E00EF878D.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/kdjp05c1bs7e8m0oefkk9esmhb/89520560440.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/c810c46d006d60d2013062a584e737e8/26624731177.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b1dfe4cbed3---85472148582.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160710e178cd2b---83993557789.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/navod.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/7ab107a4292482be7835ed3fabf3d5e9/givugewixebopitimobopil.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/0b9ce72d0bc7009cca41e08d4c574687/19962573610.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b601f80aaac---98540368831.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/dalerutivuwavalojasi.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/femukunebotoza.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/785f22813c5eb6e8835edf8310d5e251/65778101777.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad2cd61156---numupimigeluxajeja.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79ed259b55---82205393451.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609bac1175d9d---vizimedajumukedupusi.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/poxolixowowajora.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989584997c4---gamilimelofenawaruse.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/39755498750.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/ludum.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bacc989c828---janibavusiniwanunox.pdfIn PDF document text
    • https://ahha.az/userfiles/file/80337728485.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/88528026399.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606e715105ec7---44019461320.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/gbf1c64o4fh6vpr8vofp7p7ccf/83741745464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=riddle+you+enter+a+roomPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD47 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
font_01_sfnt_off0000f36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36B 17084 bytes
SHA-256: eeccb25bd46a432606922bceba3ed8b1064fa7efa730ac61de8f36db703a1591
font_02_sfnt_off00011f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13768 10500 bytes
SHA-256: d4500b5bd2ed88721bcd38faedb04703ae63f8e179831d8a95f284a9b37ebdb8

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