Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c3345b8f434ad8…

MALICIOUS

PDF

89.9 KB Created: 2021-07-05 01:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d392f31753eba3b7cca4a569e3b26129 SHA-1: 845a8a8ade5dc821b54d1a22d18621f47102c08e SHA-256: 12c3345b8f434ad8feff46e5f7866d7be588974a2582af31b7e27155a9023cba
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The file's structure and content indicate it's designed to lure users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nomylo.ru/uplcv?utm_term=helping+verbs+definition PDF link annotation
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609db9416d021---22630425384.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/b8519b87d2a98299be704ca096498821/pafoxo.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607441bdcfca3---26743388387.pdfIn PDF document text
    • http://hf1968.com/clients/48820/File/6183256016.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e0d7bbda9---66826472768.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/k0imva1d07m0s6hvf1lk5jm780/27081289739.pdfIn PDF document text
    • http://meta-min.com/files/padipemufok.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/numutabamapinonivig.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609851e0d5a29---16262167738.pdfIn PDF document text
    • http://hncastlecable.com/d/files/xamujexanufaso.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/1685818866.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65209666651.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dafcaedf156---24280956176.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/ef9me8312s15qmdp1g1h1uujsk/67846312233.pdfIn PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/75678472057.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075a503541c8---kitegujivepilumav.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/xitoranukef.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0dfg1ct3nut5rl7ji4lekmleh2/vebabemabadeg.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d3cba963c1c---sepogubamuve.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013e1f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13E1F 17940 bytes
SHA-256: 591300c7a85f0cc86ea90b08d9283e437a3cb5e8409ef79a31eb489e0d82bd45
font_00_sfnt_off0000e11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92D 17224 bytes
SHA-256: 9441b08b5986e5648650b4ef45f8adbcab5721bf820a3a7e8f9ef1abecb0869c
font_02_sfnt_off000125ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EF 10708 bytes
SHA-256: 085e660c62bd5d6a7e88d2580b6eafcea84001b4d3d51fb0db3a9021cc70a31f

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