Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d36c1465e79346e…

MALICIOUS

PDF

101.5 KB Created: 2021-06-27 21:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e39c652798ab17098a7d090c040c980b SHA-1: 044b98f845ddcde37d0e07f00edef81c195a2f0f SHA-256: 8d36c1465e79346efa51e0bf9c6e430c7c64a64991256cfebaf7402d0866a760
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c323e9ce2b3---37634484078.pdf In PDF document text
    • http://iltorg.ru/upload/file/95548146267.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/28181112583.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/69625498453.pdfIn PDF document text
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/zijubedekolidaroluv.pdfIn PDF document text
    • https://ivanamihic.com//files/napakodo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b2b3ac83fe4---49230891650.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/25032455019.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d786789f57---24822362063.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/vafiv.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/xuxejotuwabumuduvizavak.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/355380c8fa312528bf6fcd5984315f12/fotutimem.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074770244c88---49642084666.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f1fb84dfa951437e9b4ceb65340bd41f/98914567281.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609298fd4e399---kalerogilatutixox.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609315a41e6c5---84691619774.pdfIn PDF document text
    • https://mszukam.pl/dat//file/kenipu.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ce9b29f54---tituwewozepetusesewab.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e0f72c05f039fdecdbc2660879d48274/zurodikisunatibom.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/fe9c0795ff2d2bc6448f2261d4ee3b6c/84544986633.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/eaa43f9d08a5e30ae81a230e7c20ef9a/28435866966.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210523060056.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607738350e087---20829265262.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pizodasujivig.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/55382029989.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609943978c2d5---28290036256.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/eo6m8h8p948oo5gec26029log3/fulefixap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+old+man+and+the+sea+ernest+hemingway+pdf+downloadPDF 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_off0001297d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297D 17268 bytes
SHA-256: c87dc52a0ee5a2527ab0d399b0d2eac17fb42bfe16828e8a0d871fb9e40d7e1f
font_01_sfnt_off0001568b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1568B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EA2 11108 bytes
SHA-256: 9c3d921e4c04d1a0100354843efd350797aa5846e0de02d416fe0c68564b28ba