Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0fba825fbb0ece…

MALICIOUS

PDF

53.0 KB Created: 2020-03-20 09:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 482397f3274ce07ebf68d8989caae3b3 SHA-1: 1f7e76224ee30d13999367e2be140ad9e95f38ef SHA-256: ea0fba825fbb0ece3c6d4576c8a8c8f9d670ec6de7b5753d5df9bd5d5b127eb4
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. The document body text, though partially corrupted, contains references to 'Macroeconomia libro samuelson' and the wkhtmltopdf generator, suggesting a lure to a website related to economics. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a technique to artificially inflate search engine rankings or distribute content across many domains, often used for malicious purposes. The embedded links likely serve to redirect users to malicious sites or download further payloads.

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://rabaisenligne.com/uploads/1/3/0/5/130550758/130550758.html#macroeconomia+libro+samuelson PDF link annotation
    • http://bernardobellostudio.com/uploads/1/3/0/2/130288710/3220049.pdfIn PDF document text
    • http://bestofwachusett.com/uploads/1/3/0/4/130435609/c06af2a21b0254.pdfIn PDF document text
    • http://taylorbehavioral.com/uploads/1/3/0/5/130538859/fedunarewijifu.pdfIn PDF document text
    • http://coryscupboard.com/uploads/1/3/0/7/130739549/4781533.pdfIn PDF document text
    • http://pianowelder.com/uploads/1/3/0/3/130323271/74279b5.pdfIn PDF document text
    • http://solutionsforenergy.co.uk/uploads/1/3/0/5/130550961/5937716.pdfIn PDF document text
    • http://mail.annieivanova.com/uploads/1/3/0/7/130739139/e90e7a7a.pdfIn PDF document text
    • http://tereayersmusic.com/uploads/1/3/0/5/130551463/1511559.pdfIn PDF document text
    • http://chicagovoicetalent.com/uploads/1/3/0/2/130271016/54ae68dddbf04.pdfIn PDF document text
    • http://mta-sts.mx.lifeofpen.com/uploads/1/3/0/6/130640029/9077c174d87e9e.pdfIn PDF document text
    • http://www.mrhendersonclass.com/uploads/1/3/0/8/130874588/b6935a00d6406.pdfIn PDF document text
    • http://9i5xt.bpmtc.com/uploads/1/3/0/5/130590310/rorilenaxamabasagal.pdfIn PDF document text
    • http://nicholebertucci.com/uploads/1/3/0/6/130604580/2e9a2.pdfIn PDF document text
    • http://www.mike-nicholls.com/uploads/1/3/0/7/130739924/rofesefokinixo.pdfIn PDF document text
    • http://www.saloteflorist.com/uploads/1/3/0/7/130739363/juzawuwalixawokodajo.pdfIn PDF document text
    • http://www.madmediamistress.com/uploads/1/3/0/6/130639093/3675438.pdfIn PDF document text
    • http://justfuego.com/uploads/1/3/0/5/130543010/81574b13.pdfIn PDF document text
    • http://mta-sts.lifsstill.net/uploads/1/3/0/7/130775651/8a9ce.pdfIn PDF document text
    • http://pinthis.co/uploads/1/3/0/5/130551434/4055703.pdfIn PDF document text
    • http://tashedynasty.com/uploads/1/3/0/7/130738623/4758003.pdfIn PDF document text
    • http://www.musicbytommyward.com/uploads/1/3/0/3/130323455/6127832.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 4

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_off0000a46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46C 9360 bytes
SHA-256: 74061d944933131f4cc9cbd18d170c8c7d67d85db416d12113e0c0cd2a1565e2

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