Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9d37a617c952ee…

MALICIOUS

PDF

86.9 KB Created: 2021-06-26 05:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 533ec653a5f2202a22c4b6d8fab5e65a SHA-1: b2327b1bf6565b7fae624776cddcf07a5e73242c SHA-256: 1b9d37a617c952ee763843235fa5fc3f6856ad4eefcd52545d3323e414c19f4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised websites, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of multiple links on disposable hosting and the use of UTM parameters further support a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/2adaab8fbc28671cd99c9739450f931c/65200396774.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/17b07a46f804b69deaf004fb3fdb1e6c/vusokivawutitezufelez.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/d53969b7352c1244d825317d21e4c6f3/sulever.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/05e7c9087d9dd7a18550a342cd5e38a9/fenufonedajijixipi.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/78ivhgdh07d4n2e2dlr8a18j3l/nijelowegetawitesom.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/d4411d74f20db4f6831aa8d6d247ff15/36973797149.pdfIn PDF document text
    • https://isosklo.cz./uploads/64348048162.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/gapulanawigesaliker.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da520675f5---romefeziwexavuja.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/47358714580.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/186849209860ab346400df8.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1373e8113---92125570198.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/42181227475.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/8c6144cc2970415ca92cdc13ad4036a9/moteves.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/q2n5ks0pk32fukaliavpa3qesf/gojesewolakilojanesa.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/dawokululaxesedivirafibuf.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/95943028269.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc71c4bd962---widinevumarokijub.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/8900d9d6a3bb74bf6a6e53a31aaade0b/levadomanokevopijeloku.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a3790e379---pikelawanipirugud.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/31646383067.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210617232816_9agtev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=all+japanese+candlestick+patterns+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 10696 bytes
SHA-256: 9845173c5ce7f2bbbc79f24c20a8fd509b8591aa0200bc7e8ecf126387e43961
font_02_sfnt_off00011778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 2060 bytes
SHA-256: 8b10b3b40a9958e038d834b25e36b390e4516f762aecd6a23b73fd2c4466aa4a
font_03_sfnt_off000120df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DF 17048 bytes
SHA-256: 7bb325a2daa82e62ee1170995b4533834f4e0f8c0c130ecccce95db22b1eeb9a

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