Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba68dd635e725b4…

MALICIOUS

PDF

36.3 KB Created: 2020-03-22 08:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 7fc11a8efd07d368d9d2048b467243e3 SHA-1: 6a242babc16990c28bebc35b0edf11d96b101b67 SHA-256: cba68dd635e725b4a779210de3654e1b957106032e0b3cf0576e7d69770d627d
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to a study plan and references the wkhtmltopdf tool, suggesting it was generated programmatically. The primary function appears to be directing users to a vast collection of other PDF files hosted across numerous domains, likely for SEO spam or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://benkregel.com/uploads/1/3/0/5/130544694/130544694.html#plan+de+estudios+administracion+de+empresas+turisticas+buap PDF link annotation
    • http://nohur.com/uploads/1/3/0/6/130621148/b1ec4ccaa53.pdfIn PDF document text
    • http://unitedplanetnetwork.net/uploads/1/3/0/3/130323172/motonikirem.pdfIn PDF document text
    • http://applesandbooks.com/uploads/1/3/0/6/130605230/2118349.pdfIn PDF document text
    • http://hollieferris.com/uploads/1/3/0/2/130288893/tupop-zowaki-dulumujimoxotoj-pilunajenadira.pdfIn PDF document text
    • http://okanaganfarmfresh.com/uploads/1/3/0/7/130740199/a16698a7c.pdfIn PDF document text
    • http://xlnttintmidatlantic.com/uploads/1/3/0/4/130476091/lozumisorog-zutifogi.pdfIn PDF document text
    • http://rosemattress.com/uploads/1/3/0/5/130550809/eb77afa.pdfIn PDF document text
    • http://doceinstein.com/uploads/1/3/0/3/130323571/dukewuzet.pdfIn PDF document text
    • http://celesteliversidge.com/uploads/1/3/0/5/130589135/485dd2cdf742ae9.pdfIn PDF document text
    • http://www.deliciouskratom.com/uploads/1/3/0/6/130621281/2107411.pdfIn PDF document text
    • http://circlerockentertainment.com/uploads/1/3/0/3/130323748/feguriluwuw.pdfIn PDF document text
    • http://mayellanatural.com/uploads/1/3/0/6/130604086/59751c2a426.pdfIn PDF document text
    • http://wildhorsesanctuary.net/uploads/1/3/0/2/130272083/jaxudukugawe_jatifokibex.pdfIn PDF document text
    • http://www.nshaked.org/uploads/1/3/0/4/130489351/4c0e42.pdfIn PDF document text
    • http://london-pet-grooming.co.uk/uploads/1/3/0/7/130776590/f860c9c.pdfIn PDF document text
    • http://citizensmedicare.org/uploads/1/3/0/3/130323190/6a09a7e.pdfIn PDF document text
    • http://www.ariastudios.net/uploads/1/3/0/3/130323748/8f0152dc63.pdfIn PDF document text
    • http://partabcdeasyas123.com/uploads/1/3/0/6/130639621/lafam-wofow.pdfIn PDF document text
    • http://www.blakeleysmobilemechanic.com/uploads/1/3/0/5/130545957/5472920.pdfIn PDF document text
    • http://bzsmoke.com/uploads/1/3/0/5/130544437/2276600.pdfIn PDF document text
    • http://boostmybalance.com/uploads/1/3/0/7/130738631/rosirulanuvufukan.pdfIn PDF document text
    • http://jumpingbeanschildcare.com/uploads/1/3/0/3/130324326/212da.pdfIn PDF document text
    • http://allisonevansphd.com/uploads/1/3/0/6/130639980/tedodig.pdfIn PDF document text
    • http://myfoodobservatory.com/uploads/1/3/0/6/130604011/2eb1227929.pdfIn PDF document text
    • http://betsybeachart.com/uploads/1/3/0/6/130639608/2e4b7af.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 7800 bytes
SHA-256: 084fc7b4547d206639d8815b06e23821a901294ddd6d5f96163a8a2404a92f79

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