Malicious PDF — malware analysis report

Static analysis result for SHA-256 0666ab543cb45f37…

MALICIOUS

PDF

106.5 KB Created: 2021-06-27 11:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0751feeeeaf31f55e1b93667fa6e38bf SHA-1: 09c189d3e76baa8aa65aab886a9a4af1475e16ef SHA-256: 0666ab543cb45f375d5e8462d349bc5f6ac7b2f6ecaae92deb7e9a1288418d11
204 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of a 'payment redirection lure' heuristic strongly suggests this is part of a business email compromise (BEC) or phishing campaign. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of exploitation for client execution, likely leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/oc0il7ldtapuknkd97s0ast216/jimewibuwunakosudiveg.pdf In PDF document text
    • http://lumieretvie.com/userfiles/file/50077998336.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/49505329359.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca79eb187f---kurowe.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/06fae0259eacef6721afe70fc4c67833/jufolirizamerisesadapi.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/wuxutede.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770f9049c59---giwevixoxa.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/b0141a8a84d191c54017ec678793c6c3/99826237141.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/mivimuzuvufimemer.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/50356571092.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/97851621979.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/b8ffff5c36006f64d0c822d5f41c0b67/6893112766.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ddf565206eec1a697a78371f0d1f8951/33185358267.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0a643189ed3724b3b034d23758a1384e/jotapasoberuzeluxun.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/e5d4cd518d7d9f1487f25403c4ca3dd2/verinojegipuranuwuzulovi.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/130c453e85debba6bbf80009f2df807b/kebinawa.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41a5f5cc7c---gowufopud.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/37fdurem6f21ot6ogas3nmh1s5/97887093781.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/mutonuwi.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/6e0227a6942e8a15b3e140a5e0bbc9f8/25492449080.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/68317995313.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/225e00f81d5340788bd35c64ad5ed331/faluwakiruse.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c56fe80fb9---jirowavero.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+giver+chapter+6PDF 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_off00013e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E71 10412 bytes
SHA-256: 10f696046c5cb8c448b06990ac49fdca76a4ce7b032bbdec3567ed9082a32877
font_01_sfnt_off00015637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15637 17228 bytes
SHA-256: 6c5082526b11ccbf7ba7a0c595ebdb68ec49f8ed4eafe83bd281ebe1ac22feb2
font_02_sfnt_off0001833d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1833D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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