Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f28a7a6b5e6054…

MALICIOUS

PDF

42.3 KB Created: 2020-03-27 07:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 9753d1522e2acb82bd24f807c2bf4234 SHA-1: 512105dfa7c54210500e088e3aa08fd4517c9ed2 SHA-256: 45f28a7a6b5e60548a022801b2320853ff2873241676d92cfc1faab56849e846
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains the title 'Escala la mayor para violin' and references to wkhtmltopdf, suggesting it was generated programmatically. The primary attack pattern involves directing users to a vast network of linked PDF files hosted on numerous domains, likely for SEO poisoning or to distribute further malicious content. No scripts were extracted from this sample.

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://transatlanticaccentpreservationsociety.org/uploads/1/3/0/6/130605515/130605515.html#escala+la+mayor+para+violin PDF link annotation
    • http://playingsuperhereos.com/uploads/1/3/0/4/130483902/5729094.pdfIn PDF document text
    • http://mtziongoshen.church/uploads/1/3/0/6/130603740/a6afa486be.pdfIn PDF document text
    • http://ruefrancaise.com/uploads/1/3/0/6/130604195/mezunaravi-kegatitazimato.pdfIn PDF document text
    • http://coachingmetabolico.com/uploads/1/3/0/9/130969701/welolofiwupofakiruf.pdfIn PDF document text
    • http://www.spk12ed.com/uploads/1/3/0/4/130436171/34e68eda20.pdfIn PDF document text
    • http://www.meritcardmoapp.com/uploads/1/3/0/8/130814669/245903.pdfIn PDF document text
    • http://naeaglemulch.com/uploads/1/3/0/7/130775986/bd91c1d5.pdfIn PDF document text
    • http://eastcorkpayroll.ie/uploads/1/3/0/7/130739656/bimapadono_fatew_xatezu_maxogagovadote.pdfIn PDF document text
    • http://acheevo.com/uploads/1/3/0/5/130543665/8310215.pdfIn PDF document text
    • http://noniecabrera.com/uploads/1/3/0/4/130477026/lubik-bawiw.pdfIn PDF document text
    • http://crescendospeech.com/uploads/1/3/0/4/130435985/e44d788c4391.pdfIn PDF document text
    • http://www.designsbymygirls.com/uploads/1/3/0/5/130551581/7404168.pdfIn PDF document text
    • http://northcoastfoodtours.com/uploads/1/3/0/6/130621800/215339.pdfIn PDF document text
    • http://thecollectorsoutpost-store.com/uploads/1/3/0/6/130604766/8392683.pdfIn PDF document text
    • http://gcadassociates.com/uploads/1/3/0/7/130738889/teker.pdfIn PDF document text
    • http://encyclobeerdia.com/uploads/1/3/0/7/130740066/larowepanatuwi.pdfIn PDF document text
    • http://mydobel.store/uploads/1/3/0/2/130270893/4157032.pdfIn PDF document text
    • http://traillsendmountainbikecamp.com/uploads/1/3/0/6/130605204/edc242462e41.pdfIn PDF document text
    • http://www.performanceconspiracy.com/uploads/1/3/0/9/130969237/45cb655.pdfIn PDF document text
    • http://www.angelicharpacademy.com/uploads/1/3/0/9/130969553/708594.pdfIn PDF document text
    • http://ljzine.com/uploads/1/3/0/6/130604366/8735882.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
🗂 Part of campaign: acheevo.com 5 samples

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_off00007a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A02 8908 bytes
SHA-256: de7e302ef905bd8f0e4877e5663e2095935af3cab75875a8de330c34dc4866ab

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