Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bc1b4e55aea50e…

MALICIOUS

PDF

114.4 KB Created: 2021-06-27 02:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0d3f24b2f71add6d27f28f9ea5e76109 SHA-1: e7c9c545d896d9786a1c26e3813b5467a6b886f3 SHA-256: 82bc1b4e55aea50ec0a928ea1fd382ac56f356354cfe3d37d55d624c1a29cb62
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://coretry.ru/uplcv?utm_term=introduction+to+arabic+natural+language+processing PDF link annotation
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/49667693706.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160834db32107d---xaxajigixitepixuzet.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/49853741712.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/zedikape.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c31095c3d---6109836804.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/falanibalut.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4d0dea3ac---xewefidawujeramowodo.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/a17c4edaf6a2c6a9ef123d6d79db2040/faxukibiwa.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/fopomewunalax.pdfIn PDF document text
    • https://etadelloro.it/images/file/retemidejumuzikojomopatef.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-4/20210504171249194608.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092452e29a49---rifibona.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b37ee9c57e9986f9981f0ec10858193e/18485441513.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/rcnlpua06tc3k197f9hdpqd7tv/wepolif.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072628a69c42---pepuropumolufomig.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/4vgctsqah5bi2037f7eaej1la5/tokitoduxizar.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/56e98efb376a339202b994b9e07fe9ac/28913514069.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160760f669b325---dexabolokebosujo.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/51686496443.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/58420968773.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3iaui4jum9ft81pr3p6bd9r76i/18555451275.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B92 18052 bytes
SHA-256: 7f3150247173b4f26cd0f07de485a89cef584fcba8a1f47f450d0f353390edc4
font_01_sfnt_off00018b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A37C 10880 bytes
SHA-256: 8cd44c92dd1463b002abea8eec5df96233f67f03cfecb3112f614d08c6c409ce

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