Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b59e0d03a530a0…

MALICIOUS

PDF

82.3 KB Created: 2021-06-26 15:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fe919dfe67db93bfc742e32d96855c98 SHA-1: 47513adf7cf0b9b0e3bb243c028445111d515909 SHA-256: 39b59e0d03a530a01f03731b169b743e8571b445484b541c06110ae4bad1d9d4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious payloads, aligning with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://allytemp.ru/uplcv?utm_term=technical+and+economic+feasibility PDF link annotation
    • http://novichiha.ru/pic/file/takitijoxeseweviwi.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/57dfe7e4756c7d2f8a2ad68428202578/14287268231.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/60983514757.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/nnvgm2cf5fged38bn42d7gu7l4/rikujigiwibaguranowidorur.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/62890357441.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/duwipuvure.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/c35699b3ac5287d9099413092cd9224b/73630717752.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aff164b5562---51224332719.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9916b504---motuzatagonu.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b745b6781---74005817242.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/salofot.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087d9bec1eef---28065693399.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210504020140_1943944190.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/e57160f0987ebe4735a81a2b530346bf/wazijogamolufokaxajamozen.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/rugixenufifoxatib.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bbdf83c40---jepurafufakewomidixu.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3cb38ea37---tesevudub.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/navexagumuxofukaledepeb.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f408e518---25583056706.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/764707eefb6c2383deec076a7c1c267e/nenukerixejetutamemekomu.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/3be71acd5a0505c30c67856bcb654917/54417421576.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/7434d47ae3a9892617c0b9b886b9504a/9335359558.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/vegojinen.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/aj66k0ji41clv39lqdch9jss2m/69801246410.pdfIn PDF document text
    • http://cbwmd.com/uploads/Files/17228855904.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_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 10860 bytes
SHA-256: 30b46ddddb3d892dc059c9ced984bbc28ab4a59f32a4f97ae230325cb67e5608
font_01_sfnt_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 16272 bytes
SHA-256: 07d5ddc9a9ea29a7f723b8a23327d44adb3b5a3b388d5835dc82fb3d5e084252

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