Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b8cf5759e0ac6a…

MALICIOUS

PDF

32.4 KB Created: 2020-03-13 13:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 60b2a36b2e7dc183023aac2123d0b0e1 SHA-1: 5c56656c94bb75b78f79421efea211fa88e2438c SHA-256: f5b8cf5759e0ac6a493b700007dca83be846617df9daad6ddd4f01e80138d577
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, many of which point to similarly structured URLs on various domains. The document body text, though partially corrupted, includes a reference to 'Acido borico ficha de seguridad merck', suggesting a lure to a fake security data sheet. The primary heuristic indicates a PDF link farm, designed to drive traffic to numerous external pages. The embedded URLs are likely part of this SEO spam or phishing campaign.

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://brakeactive.com/uploads/1/3/0/2/130289703/130289703.html#acido+borico+ficha+de+seguridad+merck PDF link annotation
    • http://releasingpotential.org/uploads/1/3/0/5/130588494/jenelubedeluwijavog.pdfIn PDF document text
    • http://backyardgiantgames.com/uploads/1/3/0/5/130551880/9930048.pdfIn PDF document text
    • http://norbertfodor.com/uploads/1/3/0/4/130483606/9095344.pdfIn PDF document text
    • http://ashiyanallc.com/uploads/1/3/0/2/130288854/825858.pdfIn PDF document text
    • http://www.ciposse.com/uploads/1/3/0/6/130620451/muzekafo.pdfIn PDF document text
    • http://vandellsfanclub.com/uploads/1/3/0/8/130874156/dafaxov_viwijula.pdfIn PDF document text
    • http://webdisk.wecreatestars.com/uploads/1/3/0/9/130969265/dadad_mutezasededer_segoxo_jokujudalow.pdfIn PDF document text
    • http://norcalglad.com/uploads/1/3/0/6/130621109/zabalixibuk.pdfIn PDF document text
    • http://bytcorp.org/uploads/1/3/0/4/130476458/peboz-mekul-muwifigenadima.pdfIn PDF document text
    • http://angiemoll.com/uploads/1/3/0/7/130739573/xikenelimexanafod.pdfIn PDF document text
    • http://hoozenconsulting.com/uploads/1/3/0/4/130489253/e6856388.pdfIn PDF document text
    • http://yourjourneytravel.com/uploads/1/3/0/8/130814758/1459018.pdfIn PDF document text
    • http://www.nataliecarney.com/uploads/1/3/0/6/130621788/630749.pdfIn PDF document text
    • http://wmsperformingarts.com/uploads/1/3/0/3/130312912/voxap.pdfIn PDF document text
    • http://opvakantie.org/uploads/1/3/0/2/130272474/gizedimi.pdfIn PDF document text
    • http://www.serenemeadowshc.com/uploads/1/3/0/2/130289421/vovituxujatoji_pofidirira.pdfIn PDF document text
    • http://azmendinglives.com/uploads/1/3/0/2/130270864/6299494.pdfIn PDF document text
    • http://missmillersclassroom.com/uploads/1/3/0/6/130620985/566973.pdfIn PDF document text
    • http://sanderellas.ca/uploads/1/3/0/7/130776850/4802731.pdfIn PDF document text
    • http://brewcitynavhda.com/uploads/1/3/0/3/130323469/gunol.pdfIn PDF document text
    • http://gmarinaccio.com/uploads/1/3/0/6/130620511/4516029.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_off000059c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C6 6104 bytes
SHA-256: 6ae8f73ceef9cc2c80c5f28ec42621969c1680df5a4db86ca3ccd7b156f5faa8

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