Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e3cceb708e65c0…

MALICIOUS

PDF

83.5 KB Created: 2021-07-03 01:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2223bc98bf796b9bb2ad1697b0b8d5ca SHA-1: 64a2d78802898d186ee2d9eee37511e6701a6039 SHA-256: f1e3cceb708e65c057f3d4e8a3f4d3d40c8792d1ea38e9b3c90eb7371147f689
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded JavaScript and the link farm indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fea63dc8d2---82821185947.pdf In PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0377bcb5ba02dff98ca3e48ace64c652/kodafanixowopesexuzumaja.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/df7b919f2a20f385e749b2388df9b0a9/68168453259.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6a11c57cbb013d786d6d2614e28b74bf/96185485947.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/gafuvutefugetowuw.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/62937309927.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/44103698907.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cdf288751---75118046171.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609058aef416d---63730635794.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3900bf636---bepoduwikiwekapudozoki.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/84232381615.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/73521140133.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/gsqvd9bllpikkmsah8clpgt3d2/midewugikokazado.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdca244950f---marubexuwuxomi.pdfIn PDF document text
    • https://coil.hk/upload/files/72129507941.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/kiwad.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876cea05d4d---15032766517.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/mirixinofiwanevezopizarez.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/0ed16632526f2d800e58f6a76685bb28/rupufujikuruvuni.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/657982a74ae2b5fe2a90cd620d4e69cd/xozujiwo.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16080535ee0e3c---zevoti.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/146929e1accaf86770f2d7525361666a/gugibojeses.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c95779cb8e4---topomufuxo.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608866fd0afd9---palalosovujipepojenatefan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=geometry+dash+speed+hack+2.11+download+androidPDF 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_off0000c959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 11348 bytes
SHA-256: 245e623e3da792cc5ca596a6c9051eb19da46b7f53fd729bf4165bc10919c7a0
font_02_sfnt_off0000fc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC29 16948 bytes
SHA-256: 4923e3120f48449aeda0fc28c93bed7993741a05ef65623811c012023ddfacc8
font_03_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 16164 bytes
SHA-256: 3ebd486235ab6c407a74d98ab9e1cf09d7661342c8c98090703f1c8ee3396579

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