Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbe037b46b239e2…

MALICIOUS

PDF

83.3 KB Created: 2021-07-07 13:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 92d0eeed2bbcb565cfd7a8a7284faa6c SHA-1: cc810e7fda8b6b26fff95d1c2bf634a81c241211 SHA-256: 2cbe037b46b239e2b7058bb7a6d7466ef88102583f581f07e7dc68cd1d8830bf
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to distribute malicious content or engage in SEO manipulation. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/8a20uoggbb76kn2o7hb7kpcovr/vufuderilota.pdf In PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/81072169430.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/59454035840.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/949e4876b2f237b24e00cf3984da7730/menazepesuxisodapu.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/zufij.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/xagikatesag.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/81c74ae91e6c6aceb06e54d6639752c9/98163853798.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b4f07a0d410aefcdffdd51153c636662/xosaxelugufadijonisokavol.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e55b1b38a---vusaguporevejol.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1j88jbkvf1alhitiakkqc6otu3/varedenewoxatevor.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4jbcu18vk4ab0j9g0g106uhhf7/janupepasinatekuzo.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce5c5835a3---35065185505.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/9k1r61a2frp6vonvemt9vm0kq9/45063883062.pdfIn PDF document text
    • https://ikima.fr/uploads/file/27188203068.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/4014ceca80ddf303091119c4fc54b9e7/48468680243.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b109983766---70050504586.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb912a32df5---sikaguti.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/c72f4ae405f535821f94d251227df0ef/18503609156.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5510b7d47---towaluterubanugaduzisujan.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/89977753900.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/611607ffbc3d8a549320fcc2660f7359/xitogezexirasibowadi.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/fifiruk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+draw+anime+fistsPDF 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_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 10544 bytes
SHA-256: 74fc44c04e54dff38e2812dcdf88bb5961fef69c3c51edb8825cc657c8c67a77
font_01_sfnt_off0000fef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF5 16024 bytes
SHA-256: 1efde6b5b4c659172b0f50eb86abc59b8f9e850ea56b8d90fcc4dc1f23475496
font_02_sfnt_off00012846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12846 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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