Malicious PDF — malware analysis report

Static analysis result for SHA-256 4043385bbb9d0fbf…

MALICIOUS

PDF

96.7 KB Created: 2021-06-27 06:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8c3c4d4efc767f81851403f49d08af9d SHA-1: 419d66f123a2e455a470c3d10273100b496f5874 SHA-256: 4043385bbb9d0fbfbda398b061f00bf557ce5878614a0d741bdd86213e7c1718
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous disposable domains and compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://fundreamz.com/ckfinder/userfiles/files/74539130550.pdf In PDF document text
    • https://briljant-maleri.se/UserFiles/files/wuzaduvaturitulemifopowo.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/zusagugutizafuzalekonunaw.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/duzovurakuxuvidojurag.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-8/20210608175650445630.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/hd4vpjkm7v5ql1tqklm0qacou3/sezemamisutuze.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/48f0ee0bec744af110eb44e7d486a132/wobewinawepemekulekotoz.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c0d5baa69---vologodixatarudifamu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f1dafc6c48718e801afc6da4470c478f/74320733547.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/pegaxuzudozisexiveligaw.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160bb55e4d7e6a---valawuvewedidopid.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/wowopomawuvopuzixedu.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/rixunatezexapebarenelod.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16070f7d056802---jowiremexodop.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d3ab387a9---funisadedima.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/54005316530.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/sabamujeronotajitoxikol.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/af0b63e1746f67a9c7de867d2cc8e1b4/madogenunolixexa.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/du6q4usqfm4hlruvvt85qdm5vj/zifavanu.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/6fbc181126d9865b31b394c7a82d8d29/80045925734.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/1ofrcneq1gtfqhe0qkcfplfb8q/9782664547.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0430e20a1c---jugopigodevagajowupevef.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/4b4q4bl7b1mspbn5vjdo51cjtu/46402238836.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/56240980761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=assassin%27s+creed+odyssey+phoibe+is+dead+because+of+youPDF 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_off00011904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11904 10940 bytes
SHA-256: e8b2300828d6565d3c472b21d61e3971bb14157429a75de40c8db27fe60f22e2
font_01_sfnt_off00013221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13221 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A33 16704 bytes
SHA-256: 04af13a24995adf16919f8e53b271117ed9bbbc6e73f9f0168c09dea3bf5da0c