Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f912e341482bb4…

MALICIOUS

PDF

84.8 KB Created: 2021-07-05 21:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c4fb577ef924bbf073118621ffe5ce99 SHA-1: c7c409fd9a257576be23208993dc955b81065815 SHA-256: 09f912e341482bb42314edc79a3a5a67331eb9ddc7fc8ed3b6a682097ca9acd2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the numerous URLs serve as the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=maybe+you+had+too+much+too+fast PDF link annotation
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/ks2doeol4vndr5a0nkbhbcprfu/27319185942.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/jafunadopurogedes.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/dorilam.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/bc44691e0779712395f4b40c48db5644/voxutujixekofo.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/ea461d589e222d9ee5f80b2c63d10b4b/sofedoma.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/vabodaxir.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56005d6858---konerabusafu.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608182966c212---zepuxugaxep.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/f6c3fdb11c2ab6b776ba5b63afa94e60/rujetatuvugevajejizukano.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/85100dbdfbba31821a986ecb4450a6f3/romotukewaribipoxogi.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5e904f0deb510654fbd42a1a45d563ea/pekikiwataso.pdfIn PDF document text
    • https://mfdesign.hu/files/file/10041965626.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607f852d63bdd---mugiguxewadivom.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a63ff362b11---jovowomuzibapiropogolu.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/45504451911.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/99793866308.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/bggb1j5s29ibmnporc5kmk3166/sopulovobapag.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/62def1608b50c94c349ca6477651696f/vanadikubera.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/8vpvohq1tjeujbokip7shdei94/fodatinekuwilonefapokufog.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-27/20210527213747976486.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/b0aebb8fb15c1d4ddbc31dd290f5e4e5/42471546007.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d0c9fcb9---lokufipufenodazowavagosel.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/8c035ab9caccb1f85b8693a48c120aec/92968324639.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1625476695.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_off0000e6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C6 10748 bytes
SHA-256: 02fc1ec1abe20a6ee83f807e8ad0749d28aa44e55ec21598937e585545909209
font_01_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 17560 bytes
SHA-256: a095ac5c8bc49e7a457e7a6b83a9594d1f83db829695affdae025fd6837557b6
font_02_sfnt_off00012da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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